Why are you defining all these keys a Movement keys instead of just using the regular hotkey?

Either way, to scale up instances of way just define additional labels for each window.
I.e
<Label gamma local SendWinM WoW3>
<Label delta local SendWinM WoW3>
etc..

Then just add them to the SendLabel command..

<SendLabel alpha, bravo, gamma, delta>
<Key %Trigger%>

That will send the keys of all windows.

Also, you can define a sequence of Hotkeys in order by using 1-9 or Numpad1-Numpad9 so you don't have to type each one into the definition, like the following:
<MovementHotkey 0-9, Numpad1-Numpad9>

To add modifiers to hotkeys just add the particular modifier in front of the defined key as such..

<MovementHotkey 0-9, Numpad1-Numpad9; Shift 0-9, Numpad1-9; Ctrl 0-9, Numpad1-Numpad9>

You have to separate each block of keys by a semi colon when you want to define a different modifier for that set of keys.