Mac Hardware/Software Questions

Hey guys. Long time troller, first time post. Anywho, I'm a Mac multiboxer, and over the past 2 months or so been testing things out and been getting back into WOW finally b/c of multiboxing. I've been slowly building things up, testing out setups and what not (going from 2 box and moving up).

Anyways I'm at the point where I've been trying to do 4-box (maybe even 5) to hopefully start running instances and what not. I can run 3 no problem, with everything setup at the lowest I can at 10 fps. Just having an issue getting that fourth one to run well (gettin about 2-3 fps and with huge keystrokes delays).

My machine isnt the fastest thing out there, (dual 2gh power mac at 5gb ram), my clones have no addons besides jamba running, and main just jamba and questhelper going, as well as CloneKeys going.

So with all that said, I was debating whether or not more memory would help things out? Or can my processor just not handle any more and its time for an upgrade? Are there any other kinds of recommendations I can do to increase performance too? I gotta a feeling that I'm squeezing as much as I can out of my computer, but wanted to check out what all you mac-boxers would recommend.

Also I know there's fewer of us out there, but any way we can get mac sticky going for setups/hardware/software stuff? Having troubles to do any kind of forums search for "mac" due to character limitations on the search function of the site.

Oh...and thanks for all the helpful info you guys been posting been helping a lot.