Is this good enough?

I plan on getting a Inspiron 6000 and I was wondering would this be good enough to play games like Swat 3, sims, and run CATD Engineering programs? It's about $1500 but I got a $600 coupon so it's only $906.00. I didn't want to go with the highend because it would cost about $1200 with the $600 coupon and I wanted my laptop to be around $900. Also, can I upgrade my video card later on? Or am I stuck? Thanks

$906.00
Inspiron 6000 Intel® Pentium® M Processor 730 (1.60 GHz/2MB Cache/533MHz FSB)

Operating System Microsoft Windows XP Professional - For networking with work or school

Display 15.4 inch WXGA LCD Panel

Memory 512MB Shared DDR2 SDRAM 2 Dimms

Video Card Integrated Intel® Media Accelerator 900 Graphics

Hard Drive 40GB Hard Drive

Network Card Integrated 10/100 Network Card and Modem

Adobe Software Adobe® Acrobat® Reader 6.0

Combo/DVD+RW Drives 8x CD/DVD burner (DVD+/-RW) with double-layer write capability

Wireless Networking Card Intel® PRO/Wireless 2915 Internal Wireless (802.11 a/b/g, 54Mbps)

Office Productivity Software No productivity suite - Corel WordPerfect word processor only

Security Software New! Norton Internet Security 2005 AntiSpyware Edition 15-months

Digital <a href='http://consumeralertsystem.com/cas/zx-hclick.php?hid=268' target='_blank'>music</a> Musicmatch® Jukebox Basic

Battery 6-cell Lithium Ion Primary Battery (53 WHr)

Operating System Backup & Recovery Microsoft® Windows® XP Professional backup CD

So I wouldn't be able to play Swat3 or Sims? Also, for ram, can I buy it at newegg since it's cheaper or do I need to have Dell install it? Sorry for the questions but I'm not really familiar when it comes to laptops. Thanks.