Just wanted to post my experience with this. I have a stock A4000 040 that I upgraded to OS 3.9. I actually have 3.0 ROMs but am able to Softkick to 3.1 and OS 3.9 works fine, even with the AmigaOS ROM Updates! Anyway I had this Toshiba DVD-ROM drive (IDE) so I thought, what the hey, let me hook it up and see if it works. I already had a NEC CDRW that was working with the Cache CDFS just fine. I plugged the drive it and it read CDs fine. Then I tried a DVD-R I had burned of some files and guess what? It read the disc! I also tried a DVD I made with over 3GB of WHDload games and it also worked! Awesome! I was not aware of built in DVD-ROM support in AmigaOS 3.9! :banana: