System Spec Check please...

Hey guys, been playing about on 3 hunters but wanted to know if you guys think my system could handle 5 box 1pc 1 screen?

Windows XP
4GB DDR2
7950GT 512mb
22" Widescreen Samsung 2ms Refresh

I currently run 3 with no hassles anywhere, I've pvp'd and been hanging in org and dont lag or skip at all. But you guys are the experts and know a crap load more than me, so I offer my system to your mercy :P

Any thoughts welcome.

Regards,