upload images to the camera

Hi there!
I don't know if this has already been discussed, but is there a way to upload images from the PC to a PTP-camera? I don't have a card reader and that way it would be possible to copy images to a CF-card and hand them to a local shop for printing.
It would be great, if I could just hit the "copy album"-icon and my camera would show up as a device in the "select destination"-treeview.
But even when I don't use cam2pc and try it with the windows explorer, it doesn't work. My Canon S45 shows up as a device under "my computer", and I can drag (copy) files FROM the camera to my hard disk, but it won't let me do it the other way round.
Any ideas if that is possible?
Thanks!
Tom
I don't know if this has already been discussed, but is there a way to upload images from the PC to a PTP-camera? I don't have a card reader and that way it would be possible to copy images to a CF-card and hand them to a local shop for printing.
It would be great, if I could just hit the "copy album"-icon and my camera would show up as a device in the "select destination"-treeview.
But even when I don't use cam2pc and try it with the windows explorer, it doesn't work. My Canon S45 shows up as a device under "my computer", and I can drag (copy) files FROM the camera to my hard disk, but it won't let me do it the other way round.
Any ideas if that is possible?
Thanks!
Tom