This post was deleted as i was writing it so... I will just go through it quickly...
I couldnt boot my external USB HD from Mac bios because it wants to be given Firewire external media. I had an external firewire dvdrom which i wanted to use for instalation drive (oh yeah, superdrive never works).
No PSU (power supply unit) though. That could mean only one thing. i had to make one myself.
After testing and thinking, i came up with a design for a custom inlet for power for the drive, which i made using those little wires we use to tie cables toge



