Ryno_402 wrote:
I also downloaded Adobe's DNG converter and it tells me "The source folder does not contain any supported camera raw files."
Ok, and I just realise that you mention problems with CS3 above. It seems the files simply are corrupt. The question is where things go wrong. It could be for example the transfer process, the cable or a problem in the camera itself.
I would take the camera to your friend and ask him to use his cable and download the files to see if there still is a problem. If there is, then the problem is in the camera. You may then want to reset the camera to default settings or even bring it back to the dealer. If there is no problem with his cable and his computer, try with your cable and his computer, and see if the problem is there.
The problem does not seem related to Aperture anyhow, as Adobe products have problems as well with the files.