Dunno anything about ati cards, Im a Nvidia slave...

I havent ever tried to run 2 instances on my main machine, but i think it could. (It can run EQ and Wow at the same time without a hiccup, and its about the same as yours, except has a geforce 7800. More ram would be nice...you might run into ram issues with more than 2 clients running.

With 2...having 2boxed wow back in the day...quests i'd say. For instances you need some other folks with ya, and tehn yer in pug territory.

Wow is actually easier to box in than eq. Well, ok, Mid level Wow is easier than High level eq. LOL. theres alot of nice features to wow (like target= and /follow name that are just nice for boxers, that eq doesnt have. (hate hate hate /target soandso /pause 25 /cast macros )

Wow natively supports windowed mode...I dont actually use WinEQ for wow. And, err, it might. but it will be a reverse. A coupla years ago I DID use wineq + wow, and they thought they found a way to detect Innerspace...but turns out (that time, anyway) they were detecting a DLL common to wineq and innerspace. So they banned everyone that used wineq in a certain time period, then 2 days later reversed most of the bans, as I recall. (they reversed mine, anyway). Who knows what their policy is now, but it probably woudlnt be a perma ban as long as you could prove thats all ya were doing. I think that the programs that only change that aspect of wow are ok. (things like wineq/maximizer) Its not in writing anywhere that i know of, but they dont ban people for it generally. If your just wanting to tab between instances, running wows native windowed mode would probably suffice.

Also, since most EQ boxers tab...well, I recommend you give keyclone or one of the other keyboard broadcasters a try if you do box wow. =0. (I actually am boxing EQ that way now) Its gonna be a bit of an adjustment, but its a much better way to box, IMO. Sorry if im telling you something you already know =0.