Thanks again for the help! And about the scripts, the one I use for HKN is the following, derived from the one on the website. The reason for the 2 templates RonWoW1 and RunWoW2 is that I wanted to try using 2 copies on the HDD to see if it improved performances, but I never actually tested it so they currently point to the same location. I masked with *** the account names and password :

//================================================== ==============
// SAMPLE SCRIPT FOR TWO WOW'S ON ONE PC
//
// Instructions: Copy this entire script (all the blue writing
// on gray background including comments). Save it in a file.
// Load it into HotkeyNet.
//
// Toggle the scroll lock key to turn hotkeys off and on. (You
// can change this if you want, just like you can change
// everything else with HotkeyNet.)
//
// Requires HotkeyNet build 147 or higher.
//
// For more info, go to www.hotkeynet.com
//================================================== ==============

<Template RunWow1><Run "E:\WoW\WoW.exe"><EndTemplate>
<Template RunWow2><Run "E:\WoW\WoW.exe"><EndTemplate>

<Template SendLabelList><SendLabel w1, w2, w3, w4, w5><EndTemplate>

<Template ResWinMain><Resize local %1% 1280 800 0 0><EndTemplate>
<Template ResWin2><Resize local %1% 400 300 0 750><EndTemplate>
<Template ResWin3><Resize local %1% 400 300 400 750><EndTemplate>
<Template ResWin4><Resize local %1% 400 300 800 750><EndTemplate>
<Template ResWin5><Resize local %1% 400 300 1200 750><EndTemplate>

//-----------------------------------------------------------
// SUBROUTINE TO RENAME A COPY OF WOW.
//-----------------------------------------------------------
<Command Rename>
<SendPC %1%>
<RenameWin %2% %3%>

//-----------------------------------------------------------
// PRESS CTRL R TO RENAME WOW'S IF YOU LAUNCH THEM MANUALLY
//-----------------------------------------------------------
<Hotkey CapsLockOn Ctrl R>
<Rename local "World of Warcraft" WoW1>
<Rename local "World of Warcraft" WoW2>
<Rename local "World of Warcraft" WoW3>
<Rename local "World of Warcraft" WoW4>
<Rename local "World of Warcraft" WoW5>

//-----------------------------------------------------------
// SUBROUTINE TO RESIZE A COPY OF WOW.
//-----------------------------------------------------------
<Command Resize>
<SendPC %1%>
<TargetWin %2%>
<SetWinSize %3% %4%>
<SetWinPos %5% %6%>

//-----------------------------------------------------------
// PRESS CTRL W TO RESIZE WOW'S IF YOU LAUNCH THEM MANUALLY
//-----------------------------------------------------------
<Hotkey CapsLockOn Ctrl W>
<ApplyTemplate ResWinMain WoW1>
<ApplyTemplate ResWin2 WoW2>
<ApplyTemplate ResWin3 WoW3>
<ApplyTemplate ResWin4 WoW4>
<ApplyTemplate ResWin5 WoW5>

//-----------------------------------------------------------
// PRESS CTRL F1/2/3/4/5 TO RESIZE WOW'S IF YOU LAUNCH THEM MANUALLY
//-----------------------------------------------------------
<Hotkey ScrollLockOn F1>
<ApplyTemplate ResWinMain WoW1>
<ApplyTemplate ResWin2 WoW2>
<ApplyTemplate ResWin3 WoW3>
<ApplyTemplate ResWin4 WoW4>
<ApplyTemplate ResWin5 WoW5>
<Hotkey ScrollLockOn F2>
<ApplyTemplate ResWinMain WoW2>
<ApplyTemplate ResWin2 WoW1>
<ApplyTemplate ResWin3 WoW3>
<ApplyTemplate ResWin4 WoW4>
<ApplyTemplate ResWin5 WoW5>
<Hotkey ScrollLockOn F3>
<ApplyTemplate ResWinMain WoW3>
<ApplyTemplate ResWin2 WoW2>
<ApplyTemplate ResWin3 WoW1>
<ApplyTemplate ResWin4 WoW4>
<ApplyTemplate ResWin5 WoW5>
<Hotkey ScrollLockOn F4>
<ApplyTemplate ResWinMain WoW4>
<ApplyTemplate ResWin2 WoW2>
<ApplyTemplate ResWin3 WoW3>
<ApplyTemplate ResWin4 WoW1>
<ApplyTemplate ResWin5 WoW5>
<Hotkey ScrollLockOn F5>
<ApplyTemplate ResWinMain WoW5>
<ApplyTemplate ResWin2 WoW2>
<ApplyTemplate ResWin3 WoW3>
<ApplyTemplate ResWin4 WoW4>
<ApplyTemplate ResWin5 WoW1>

//-----------------------------------------------------------
// SUBROUTINE TO LAUNCH AND RENAME A COPY OF WOW.
//-----------------------------------------------------------
<Command LaunchAndRename1>
<SendPC %1%>
<ApplyTemplate RunWow1>
<WaitForWin World 9000>
<Wait 450>
<RenameTargetWin %2%>
<Wait 400>
<SendWin %2%>
<text %3%>
<wait 40>
<key tab>
<wait 40>
<text **********>
<wait 40>
<key enter>
<wait 1000>
<Command LaunchAndRename2>
<SendPC %1%>
<ApplyTemplate RunWow2>
<WaitForWin World 9000>
<Wait 450>
<RenameTargetWin %2%>
<Wait 400>
<SendWin %2%>
<text %3%>
<wait 40>
<key tab>
<wait 40>
<text **********>
<wait 40>
<key enter>
<wait 1000>

//-----------------------------------------------------------
// PRESS CTRL L TO LAUNCH AND RENAME ALL WOW'S.
//-----------------------------------------------------------
<Hotkey CapsLockOn Alt Ctrl L>
<LaunchAndRename1 Local WoW1 **********><ApplyTemplate ResWinMain WoW1>
<LaunchAndRename1 Local WoW2 **********><ApplyTemplate ResWin2 WoW2>
<LaunchAndRename1 Local WoW3 **********><ApplyTemplate ResWin3 WoW3>
<LaunchAndRename2 Local WoW4 **********><ApplyTemplate ResWin4 WoW4>
<LaunchAndRename2 Local WoW5 **********><ApplyTemplate ResWin5 WoW5>

//-----------------------------------------------------------
// DEFINE MAIL LABELS FOR SENDING KEY STROKES
//-----------------------------------------------------------
<Label w1 Local SendWinM WoW1>
<Label w2 Local SendWinM WoW2>
<Label w3 Local SendWinM WoW3>
<Label w4 Local SendWinM WoW4>
<Label w5 Local SendWinM WoW5>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR 0-9 (SENT TO ALL INSTANCES)
//-----------------------------------------------------------
<Hotkey CapsLockOn 0-9>
<ApplyTemplate SendLabelList>
<Key %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR <SHIFT> 0-9 (SENT TO ALL INSTANCES)
//-----------------------------------------------------------
<Hotkey CapsLockOn LShift 0-9>
<ApplyTemplate SendLabelList>
<Key %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR C, P, B, L (SENT TO ALL INSTANCES)
//-----------------------------------------------------------
<Hotkey CapsLockOn C, P, B, L>
<ApplyTemplate SendLabelList>
<Key %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR INSTANCE 2 ONLY -> CONVERTED AS ALT+KEY
//-----------------------------------------------------------
<UseKeyAsModifier Oem1>
<Hotkey CapsLockOn Oem1 0-9>
<ApplyTemplate SendLabelList>
<Key lctrl %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR INSTANCE 3 ONLY -> CONVERTED AS ALT+KEY
//-----------------------------------------------------------
<UseKeyAsModifier Oem3>
<Hotkey CapsLockOn Oem3 0-9>
<ApplyTemplate SendLabelList>
<Key lctrl %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR INSTANCE 4 ONLY -> CONVERTED AS ALT+KEY
//-----------------------------------------------------------
<UseKeyAsModifier Oem7>
<Hotkey CapsLockOn Oem7 0-9>
<ApplyTemplate SendLabelList>
<Key lctrl %Trigger%>

//-----------------------------------------------------------
// DEFINE HOTKEYS FOR INSTANCE 5 ONLY -> CONVERTED AS ALT+KEY
//-----------------------------------------------------------
<UseKeyAsModifier Oem2>
<Hotkey CapsLockOn Oem2 0-9>
<ApplyTemplate SendLabelList>
<Key lctrl %Trigger%>

//-----------------------------------------------------------
// DEFINE MOVEMENT KEYS THAT WILL GET SENT TO BOTH WOW'S.
// ADD MORE KEYS IF YOU WANT.
//-----------------------------------------------------------
<MovementHotkey CapsLockOn up, down, left, right>
<ApplyTemplate SendLabelList>
<Key %Trigger%>

//-----------------------------------------------------------
// BROADCAST MOUSE CLICKS. HOLD DOWN OEM3 (ON U.S. KEYBOARDS,
// THAT'S THE SQUIGGLE KEY IN UPPPER LEFT CORNER) WHEN YOU
// WANT TO BROADCAST.
//-----------------------------------------------------------
<UseKeyAsModifier Oem4>
<Hotkey CapsLockOn Oem4 LButton, MButton, RButton, Button4, Button5>
<ApplyTemplate SendLabelList>
<ClickMouse %TriggerMainKey%>