I did this for my brother who is in Canada.
All you do is buy a memory stick, around 500mb, stick it in the ps3, load up your ps3 and go to your "SAVE DATA UTILITY" and then go to the games you want to save and press "triangle" I think it is for options, there you can copy the save files to the USB. Do this for all the save files you want.
Now you get the USB stick and put it into your other PS3, and go to "SAVE DATA UTILITY" and copy them in there.