I used a dual layed DVD+R, I know this isnt the best disc, its also memorex, But its this same disc that I used to play Metroid: Other M, I heard that changing the booktype would work, I have HL-DT-ST DVDRAM GSA-T20F ET02 (ATA) Drive, which should be an LG Drive, I think. I burned other M on these discs and it works perfectly. I burned a GC Multigame ISO/GCM, using DVD9 and in NTSC format, The GC BackupLuancher said FAILED NO DISK 263 or something like that. But I used the dual layed, I'm trying to use Imgburn to change the booktype, but it won't work, I tried LG, and it kept saying. Invalid Command Operation Code! But I'm sure my Drive is LG, to make sure I tried a couple of options, none worked, but when I chose DVD+R DL RW, it worked in Imgburn, but it said FAILED when I tried to change it to DVD-ROM. Sometimes I saw when they said check to see if it isn't already DVD-ROM, but I saw in Imgburn, its not. I triple checked as I wasted 2 discs on this. I'll continue to check and post on other forums. Any help will be appreciated, telling me ANYTHING you know will help, as I'm quite tech savy.