Do What traxor said an you should be Ok.
MemOptimizer does something like Cleaning up after the programs to free more memory, in SP1 you coud set something like this in Windows, but i cant find it any more.
Can anyone tell me if Mem Optimizer really helps on 2GB of RAM?
I would also recomend
Spyware Blaster to stop at leas some/most spyware/adware to even download and install itself on ur PC