[HotkeyNet] Multiboxing healers & WindowRect regions

[Akoko]

I know this sounds like a stupid question, but I couldn't find any search results relating to this. Has anyone ever used multiple healers in a BG setup? How viable is it? Do your heal targets always get out of range of your /following slaves? I'm thinking of speccing my 3 druids all resto once they hit 50 just for fun.

This part is more on-topic, and I'm specifically asking about HotKeyNet. How exactly do you set up the multiple mouseover thing?

I've read it from here: http://www.dual-boxing.com/showpost....90&postcount=7

<If MouseIsOverWindowRect WoW1 36 57 274 631>

I understand how it's done specifying regions but how the heck do you find out the boundaries of that region in the first place (without counting pixels by hand!). I use different sizes for my WoW windows however. The window on my main monitor is 1280x720 and the two windows on my second monitor are both 910x512.