Help make my computer faster so I can game!

[Skateyasha]

Alright, was trying to play Team Fortress 2 (FPS) on my laptop, but like I suspected, even at lowest quality settings for everything (sound, video etc..) and playing in a smaller screen, my computer still simply couldn't handle it. Now, preferrably I'd rather not go and just buy a new computer for a couple reasons.

1. That's expensive.
2. This laptop was a graduation/going to Univ present.

It's an HP 530 Notebook PC and runs on Windows Vista: Business. I'm pretty sure this is the exact model.

HP 530 Notebook PC GU337AT - Intel Core Duo T2300E 1.66GHz, 802.11a/b/g Wireless, 1GB DDR2, 80GB HDD, Dual Layer DVD RW, 15.4" WXGA, Windows Vista Business

Since that's the site my dad uses to buy a lot of his stuff. Judging by the price alone, I know it's not a computer meant for gaming, so what can be done to help push it along, if anything at all?