Sadly, those specs won't cut it. I have an AMD Athlon 64 3000+, 512MB RAM and ATI Radeon 9800 Pro, and I get roughly half the regular speed in the BIOS menu with the SSE2 build (which speeds up the emulation quite a bit, thanks to the SSE2 instruction optimizations). I know this may sound kinda harsh, but give it up. Even if you wouldn't use the emulator for playing, but for taking screenshots or compatibility testing... and the emulator giving you error message doesn't help. You're far better off playing with a modded PS2. It's far too early for the so-called next-gen systems to be emulated, speed-wise.