downexpected

Hi guys I found an old comp with 128mb ram 40 gig HDD Intel 8180E mobo with Celeron pros(1200 mhz) I have XP installed its pretty decent but if i use more than 3 apps it slows down(expected :rolleyes:) I was wondering if i could tweak my ram (not physically) so that my pc can run warcraft 3 any...