Im having the same issue (DVD Read Error 972) - another post with same error!!
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If anyone finds the correct dvd branded media please dont forget about the rest of us
SEE BELOW POST IN FULL AT THREAD LINK ABOVE!!
SAME HERE PEOPLE!!! 972 (using Verbatim-r's (every speed on 2 dvd burners) (im on PC Winxp sp3 - ntfs file structure )
FORGOT TO MENTION original games still work fine through neogamma, downloaded backups do not work at all for me! Have not tried backing up an original and tested as yet.
I have followed the OFFLINE guide on gba temp (Thread - ULTIMATE SYSTEM MENU GUIDE 4.0 - courtesy of user:Assassda
I started with a PAL 3.1e wii > officially updated via a PAL UK Wii (LEH) then followed Assassda's guide ULTIMATE System Menu 4.0 Guide - GBAtemp.net
and updated to PAL 4.0e with hbc and bootmii installed to boot2. Also have preloader.
I have bootmii installed to boot2 and hbc works ok.
I am having issue with NEOGammer Latest version R6 as it keeps giving me an error 792. I have used 2 different dvd drives (pioneer 112d 16x & Liteon 20x) to burn about 8 isos to (16x capable Verbatim -r burnt at 2x,4x,8x,12x,16x, also 3 Phillips DVD-r @ 2x,4x,8x. Both were burnt mainly with img burn. I also tried nero on a few occasions