hugovdb

When I duplicate a disk in the first stage of creating the ISO file I obtain two files: an ISO file and a MDS file. When I create the DVD-copy I tried first with only the ISO file. At the of the verify process there a lot of errors. Interrupting the process nevertheless the resulting DVD copy seems to work fine. When I made a copy with both files as source the menus are not working well ? Please comment.. Am I doing something wrong ?