Upgrading My PC* | EDIT: Building PC - Help with parts.

[FarePak]

Or you could go with something like this, although the motherboard is budget, its even AM3 compatible, I know this because I have it, not really used for my main computer but is gonna be used for my second computer.

Processor: AMD Athlon x2 7750 > £55
Motherboard: ASRock N68PV-GS > £40
RAM: 4GB DDR2 RAM > £30-£40
Graphic Card: 8600GT > £30-£40 / 9600GT > £80 / HD 3850 > £50 / HD 4850 > £100
( You can have a choice here, on a cheaper graphic card that is still playable on or a more expensive graphic card )

I wouldn't exactly reccomend using your current PSU, since its probably not enough power, I would say get around 500w power supply not a budget one but one thats a quite known brand such as Corsair, OCZ or even Hiper, Hiper aint one of the ones hardcore gamers go for but it still works.

My first build was with that ASRock motherboard a month or two back, although I only used that board temporally while im waiting on the main computers motherboard that was coming the week after.


Edit:
@Above: Vista 32bit running with your normal applications such as a web browser and MSN will just come under 2GB in memory usage.

Also yeah you can get RAM sticks for laptops, but un-assembling a laptop is more complicated than a desktop.