Alright that's fair! Let me elaborate in that case. At this point in time, I have a single disc image (an ISO and a CUE file). Using PowerISO, I've been able to go into the ISO file and extract TMD files because they appear to just be sitting there out in the open. I can view these TMD files in Milk...

Thanks -- if I may clarify, what am I looking for, or what am I looking at?

As in the title, I'm looking to test specific changes using a hex editor (namely making manual changes to TMD files), and was wondering how I could make changes in hex and get the game to run. In my experience on the N64 side of things, the checksum needs to get recalculated to get a modified ROM to...