I need a little help...

I have:
Win XP Pro
Intel Pentium 4 2GHz
512 MB RAM
SoundBlaster 1024 Live
GeForce 2 MX 32MB
Direct X 8.1

Now tell me:
What i need to play Star Wars games (Shadow of Empire most) and Super Smash Bro and Pokemon games?
I'm talking about plugin and setting.

I'm a newbie so please have a litlle patience.
Thank U!

;-)

Lord Zero