Using the method from the first post, you do indeed get access to a 120G hard drive.
I immediately turned around and flashed that machine's TSOP. Unless you really want to play on live for some reason, I have to recommend just connecting those two jumpers and flashing your TSOP. Actually booting a modified kernel is worlds better than using this exploit.
Seriously, being able to boot off cd-rw is fantastic. You don't even have to solder. Go to Autozone, buy a $10 rear window defogger repair kit, mask off your motherboard with tape, and paint the two jumpers with the conductive paint from the kit. Boot evox, flash with xecuter 4977 and you're done.