Would it be possible to fit a bigger processor to my PC or would it be too complicated or just not possible.

Danny is growing up fast and now some of the games he wants are getting bigger and bigger, the latest one which I didn't realise until I had loaded it, wants at least a 2Ghz processor and mine is not big enough, hence the question.

I just wondered if they are on a board and can be changed fairly simply.

Advice would be appreciated. My pc is a Dell 515 and I'm running WinXP if it's any help.