Actually, this dumping project is not that hard. You need to get familiar with chdman so as to make a backup of the hard drive. If the PC inside is built with off the shelf parts, then a bios dump involves a floppy drive and the same tools used for updating a motherboard bios. Then you would make a note of all the hardware involved in the PC.
If there is a dongle on the PC, that would be a problem.
You may find earlier parts inside the machine (early revisions and or dongles) that could be sacrificed to the dumping union.
Backing up the hard drive would be a benefit to the owner. You could offer to trade the dump for a working compact flash copy of the drive, thus sparing him from the eventual death of the hard drive.