Possible to set program priority?

Since I upgraded to 8 gigs of RAM (from 4) and changed to windows XP 64 bit (i know it sucks, but i hate vista with a passion) to support it, I've been having more lag than before the upgrade, and i'm thinking it may be something funky with the version of windows that I have that lowers the resources for programs that are not the focused window.
So I was wondering if there could be an option in keyclone to make the WoW's run in high priority mode? I cant find the way to do it manually. I know there is an option in Ventrilo for this, and I know it can be done for any program, just cant remember how.

Set Priority in HotkeyNet

why would you want a copy of wow to run in high priority?
what other programs are you running that you want to starve out? maybe you could set those to run in low priorty?

Did you test high priority by manually setting it?

check out my post here for some performance tweaking tips

[Other] wow & multisampling 24 bit colour 24 bit debth 1 x multisample, can it be lower and autostarted with keyclone?