I asume you just want to hack the dvd drive so you can play backups.
Then you probably only need this: http://hotfile.com/dl/129074413/6f8714b/jftut1.4.4.rar.html
This is the jungleflasher tutorial which contains all the info you need...
Start there, and if you manage that then you might even do the reset glitch hack (which is waay cooler) but I suggest you read, read, read and if your done reading.
Then read it all again.