From what I've read online, the Mac programs iPhoto, iTunes and ImageCapture should do this automatically. Perhaps your versions need to be updated for the iPhone transfer to work. ImageCapture can be updated from the Apple website, or the system software via the combined Mac OSX updates for the various operating systems, so you don't have to update the whole operating system, just the parts you need. iTunes is also easily and freely updated. iPhoto is the only one that you have to pay for major upgrades.

For the PC person, maybe her software needs to be updated, or maybe she didn't see the photo section that comes up within iTunes?

If it is a problem, or for more info, since I don't have an iPhone, I'd go to the forums at Apple.com and peruse there.