To access the camera via USB, it is possible to install 8.04 on a small partition, boot to that, download the pictures there, boot to the main partition with 10.04, mount the 8.04 partition, and copy the pictures to the main partition.

The only caveat is 8.04 uses grub version 1, so the newly installed grub 1 in an 8.04 install cannot recognize the grub 2 install in main installation. So after installing 8.04, you need to boot from the 10.04 CD, and reinstall grub2. Instructions are here:

http://ubuntuforums.org/showthread.php?t=1195275

See item 13, about half way down, "Reinstalling GRUB 2 from LiveCD".

Works for me.