Nei: I've got good news and bad news for you. The good news is your system is very clean codec-wise. The bad news is this: Processor: VIA C3, ~1.0GHz. That probably won't be able to play h.264 since it's a cheap and slow proc. Your only chance is to give CoreAVC a try, but don't expect anything. Read
here for instructions on how to use it with CCCP.