We have updated the beta downloads to make them easier to install:
GAME PROTOTYPE DOWNLOAD (.exe)
GAME PROTOTYPE DOWNLOAD (.zip) 

Minimum Hardware Requirements:
Windows XP, Vista or Windows 7 
Intel or AMD Processor @ 1 Ghz or better 
1GB RAM or better 
100% DirectX compatible video card with 256 MB video RAM required 
DirectX 9.0c+ 

Recommended Hardware Configuration: 
Windows XP, Vista or Windows 7 (with latest service packs installed) 
Dual-Core Intel or AMD processor @ 2.0 GHZ or better 
2 GB RAM or better 
100% DirectX compatible nVidia based video card with 1GB or more video RAM 
PhysX SDK and Runtime DirectX 9.0c+