1. Extract 1.50 DUMP to the root of your memory stick 2. Rename your UMDVideo.iso to UMDVideo.umv 3. Launch iRShell 1.50-version 4. Go to File Manager, find and launch your UMDVideo-file 5. Choose Normal Launch (x) 6. Watch&Enjoy
I too would love to see this feature added in M33 firmware, I know it is probably quite a task to code such a feature, however I think many people (myself included) who would love to run backups of their UMD's from the MS (just like you do with your backup dvd's.