Corrupt DMG backup file, help

[bert01]

Hi was wondering if there was anyone out there that help open my corrupted dmg becuase it will not open and says unmountable ( used toast and no good). I tried using disk utility to backup my files and now I can't open them. I tried to get disk utility to fix it but no good. Apple Genius Bar could not help me at all. They told me maybe a good programmer can probably open the corrupted files. it has 50 gb of data in it. I just don't want to delete any of my corrupted files. Im not that good using terminal for help but give me some advice. I tried Disk warrior, data rescue, toast, and dmg2iso: no good results. I just want to break into corrupted data and take some precious photos some are kind of hard to replace (I wish they were in flickr).