If everything is on board, then you really can't do much for it exept for maybe finding a program that will tweak the crap of of it to get it working smooth enough to play games.
I used to have a free program on my girls laptop, and it tweaked the crap out of everything, it made a 233mhz prossesor screaming fast.
But at that time there was no such thing as CD burner's, so I lost the program when the laptop got sold, but if i can only find that again on the net.
All i can remember is that it was called X-(something)