Simple question about dual-boxing in outland with an old computer..

Started dual-boxing 2 warlocks yesterday, was getting 40-50 steady fps in azeroth, 800x600, everything on lowest and some things turned off for performance.

(using autohotkey atm)
computer details:
AMD Athlon 64 3000+ (socket 754)
Ati 9600 XT
768mb DDR (not 2)

my question is, could i still dual-box in outland with this computer? since ive heard stuff about it..
GFX settings (right click on desktop etc) are "balanced" if that matters, using 1 windowed and put to the smallest size possible, and the main is windowed maximized.

also tips for better fps (if that drops in outland or whatever.) appreciated, except "buy a new computer".

Outlands is far more graphically intensive.

you only have 768MB RAM, so i figure you're computer will struggle.

Well, im probably soon (before i ding 60 anyways) buy a new computer, i cant afford a quad core so i could run 5 clients on same PC, i was wondering if this setup would run 5clients:
amd athlon 64 dual core 5600+
2gb ram
8600 gt

if ram is really needed i can buy more since its cheap.
if the gfx isnt really needed that much (i dont mind low settings), i could buy a cheaper one and buy a quad core processor instead.
if that setup wont run 5 clients i can always run 1-2 on the old computer, dont have a monitor for it though :F

+ thanks for the reply.