Stacking

OS: Windows? XP SP 2 (32-64 bits) / Windows Vista? (32-64 bits) / Windows 7? (32-64 bits) CPU Intel Core 2 Duo at 2 GHz, or AMD Athlon 64 at 2 GHz Memory: 1 GB RAM (2 GB on Windows Vista or Windows 7) Video Memory: 256 MB NVidia 8800+, ATI 3850+ HDD: 2 GB of free Hard Drive Space