I *did* read the FAQ, but I just wanted to make sure this was the problem of 'I should have bought Verbatim DVD+R DL discs' before actually going back out again.
I have here TDK DVD+R Double Layer 8x Speed 8.5 GB discs (well, that's what it says on the disc). The thing is, I tried it with a game of mine, and it worked. The .dvd file and the .iso file were burned straight to the disc, no problem, and I can play it. I tried it again afterwards with a different game of mine, and I get this following error:
