Every single jpeg photo stored on my external hard drive is not showing up on my g5 iMac, but they all come up fine on my intel iMac. The photos came from a PC, and the original source is no longer avaliable (only on external drive). Is there a setting I could change to make them come up on my G5? Why would they show up fine on the intel iMac but become "invisible" (no evidence they are even there) on the g5 iMac? How do I get them to show up on the g5?

Plug it into the computer if works with, highlight the icon, file>get info and make sure that the persmissions are read and write for all (scroll down in th info window).