it depends the 95gt is pretty unstable for gaming. it like the 84gt where pseudo gaming cards. really they are video cards trying to be gaming cards but were minimum spec when they were released 4 +years ago.
you may get it to work but it may also crash. your gfx is below minimum so i would say save your money for now untill you can upgrade the cpu and gpu to gaming spec. not being funny mate but your system is pretty far off minimum spec for todays games.
you want a minimum of a 98gt and a core 2 quad 2.4 or better with 4 gigs of ram. and thats just bare minimum to run a game like far cry 3 at low settings@1080p
a lot of people have complained that mw2 doesnt work well on much better systems than yours and at £40 quid its a fair bit of cash just to watch it play at slide show fps or just not work all together...
so yeah save your money for now and put it towards some upgrades.