|You didn't list which motherboard you have? If you have a decent board, I would overclock the CPU, upgrade to at least 4GB RAM & get a decent video card.|
FYI, DDR2-800 is the wrong RAM for a 1066MHz FSB CPU. You should be running the CPU:DRAM frequency ratio at 1:1 or 1:2, so you should either have DDR2-1066 or DDR2-533. Or you could underclock the RAM to 533MHz to match the CPU. Or if you were to overclock, you'd have a whole slew of options.