With Build 105 of HotkeyNet you can declare offsets for a mousetrigger. With this feature and using Right Click to Move in WoW you just might get lucky and have your alts go where you want them to. 8o
Sample below instructs one alt to right click 150px up and left of present cursor position and the other alt 150px up and right of present cursor. At least, I think it does! I fiddled with it for a while then decided to pass it on to you guys. I need to level!!!

<Hotkey F5>
<SendWinM LWoW1>
<MouseClick RButton +150 +150>
<SendPC 192.168.1.8>
<SendWinM RWoW3>
<Mouseclick RButton -150 +150>

It also seems to me like you could figure out the correct offset to instruct your alt to right click and loot, don't you think?