Laptop purchasing help?

I want to buy a laptop for myself for around 800-900 dollars. One of the major things I want to do with it is play video games, namely Team Fortress Two and Partly Life Two. I've unload one together already. Could I play Team Fortress Two with this setup?
SYSTEM COLOR Midnight Blue gag
PROCESSOR Intel® Core™ 2 Duo T8300 (2.4GHz/800Mhz FSB/3MB cache) edit
OPERATING SYSTEM Genuine Windows Vista® Home Premium Edition SP1, 64-bit edit
OFFICE SOFTWARE No Productivity software pre-installed edit
WARRANTY AND SERVICE 1Yr Ltd Hardware Warranty, InHome Service after Remote Diagnosis stifle
LCD AND CAMERA Standard Salute with 2.0 Megapixel Webcam edit
MEMORY 4GB Shared Dual Channel DDR2 SDRAM at 667MHz edit
HARD DRIVE Size: 320GB SATA Complex Drive (5400RPM) edit
INTERNAL OPTICAL DRIVE CD/DVD burner (DVD+/-RW Drive) edit
VIDEO PAPER 128MB NVIDIA® GeForce™ 8400M GS edit
WIRELESS GAME Dell Wireless 1505 Wireless-N Mini-card edit
BATTERY OPTIONS 56Whr Lithium Particle Battery (6 cell) edit
SOUND OPTIONS High Definition Audio 2.0 edit
My Accessories
WARRANTY SOFTWARE McAfee SecurityCenter 15-months