Also, you miiight wanna invest in another gig of memory, especially if you're running five accounts, but I'd recommend checking how you'll do with the dual/quad core first.
I've heard this mentioned several times, but 5 copies of wow with low graphics settings are only using a little more than 1.5g of ram... My ram is not paging, so unless I'm missing something adding more ram shouldn't make a diffrence

Minimising is a rather bad solution one very vital reason:

Yeah, very good point. Thankfully I have the new CPU coming in less than a month.

minimizing would have pretty close to the same effect as dropping the maxfpsbk to 1
I'll try that, thanks.. would at least be better than not seeing the other 4 at all.

do you have a second monitor attached to the system?
No, it's currently in use on another system... It will be free soon. I don't think I'll bother with it before getting my new CPU. I'm making a new group for this anyway... Pally + 4 Priests sounds like a lot of fun to me.

what OS are you running?
Windows server 2003 Wed Edition.