Ah. Good. You are able to get into the player, and have enough of developer to work with.

The easiest approach is to install a known good bootable drive in as the master drive, reconfigure (add a jumper) to the new 100GB drive to make it a slave drive, boot with both in place. You should (after possible errors) get to where you can get to a command prompt. From there, you should be able to follow the directions for a manual partition and format.