best setting to run resident evil zero ?

[PhAsR]

first i want to say hi to every1, i am new to this community
so i managed to get resident evil zero running, however ingame i have around 20fps, the game feels slow, so i want to ask you guys what the best settings are for running resident evil zero.
hope some1 can help me out

Pc specs:
AMD Athlon™ 64 X2 Dual Core Processor 6400+ (2 CPUs), ~3.2GHz
8gb ddr2 rams
ATI Radeon HD 4870
windows vista 64