Trouble with Sega Saturn ROMs

I can't seem to get any of the Saturn games I have downloaded from this website to work properly. I have with other Saturn ROMs. I am using Nero 8 and Taiyo Yuden CD-Rs with a Samsung 2x-8x burner. Thank you.

edit - I got Megaman 8 to work by burning at the Max speed (8x) and by using Disc-at-once/96, rather than just Disc-at-once. I'll try with my other failed burns.

edit - Okay, so this has worked with all of my other ISOs thus far (only I'm using 2x) except for Shining Force III and Resident Evil. It gets to the CD player screen and reads it as an audio disc. Not sure what's up.