My friend has an Xbox with a chip that allows him to save games to play later i was wondering...?

May be...

My friend has an Xbox with a chip that allows him to save games to play later i was wondering if there was a similar chip for the PS2.

There is...but this only works with the original PS2 - not the newer slim line model. This is because you need to connect a hard drive to the PS2, and then install HD Loader onto it.



You should be able to find HD Loader (or whatever it's called now) quite easily via Google.