With speed hacks (which don't seem to be too breaking in that game), the CPU is good to go for that game. The RAM is fine (anything 1GB and over is enough). I'm also betting it's an Intel IGP that that system has that's slowing you down.
__________________
"Without forgiveness, life is governed by an endless cycle of resentment and retaliation."
"Judge people not of their mistakes, but on how they handle those mistakes."
Core 2 Duo E8600 @4.0GHz- ASUS Maximus Formula (Rampage Formula BIOS 0701) - 8GB (4x 2GB) Corsair XMS2 DDR2 800
MSI nVidia GeForce 8800GT 512MB - 4x Western Digital Caviar 6400AAKS (2,560GB total) - PC Power & Cooling Silencer 610
IBM P275 21" CRT (1600x1200 @100Hz) - Logitech Z-2300 2.1 Sound System - Windows 7 64-bit & Windows XP SP3