Here is the system specifications:

"Recommended Specs"

CPU: 2.4 GHz dual core or better is recommended
RAM: 1G for XP; 2G for Vista is recommended
Harddrive: 8GB of free hard drive space
Video card: 3.0 Shader Support recommended. Nvidia Geforce 7800 or better or ATI Radeon X1800 or better


"Required (Minimum) Specs"
CPU: Intel(R) Pentium(R) 4 2.4 GHz or AMD(R) Athlon(TM) 64 2800+ processor or any 1.8Ghz Dual Core Processor or better supported
RAM: 512MB RAM;768MB for Windows Vista
Harddrive: 8GB of free hard drive space
Video card: NVIDIA(R) Geforce(TM) 6600 or better or ATI(R) Radeon(R) 9800Pro or better

I will be testing it on
CPU: AMD XP 2500+
RAM: 1 GB
Harddrive: 25GB Available
Video card: Nvidia(R) Geforce(TM) 6800

Don't have money for better computer:)