I recently backed up one of my games (Quake 4 Special Edition) with alcohol 120% Right now its in a .mdf/.mds What I would like to do is add files to this image (cheats.txt or maybe a walkthrough) and then burn my backup copy. When I tried adding files to the image in MagicISO and saving it, I have problems. I mounted the new .mdf with alcohol before burning it and I get an error. My additional files do not show up and neither do all of the folders show up as FILES in explorer.
In summary: Is there any way to add files to a backed up game in .MDF (Or how do I convert it to ISO, etc)?