and bout dummy files
only way you can mess that up is if you put em at end of a disc instead of beginning
00.dat will put it at the beginning more than likely unless u have filenames that are before that...
when i consider using dummy files, i dont make an iso, i just burn the contents to disc and usually use a 300MB dummy on 4MB programs
but all this is a thing in past anymore unless ya just starting out
edit: i suggest using nero or something cuz it's very easy to do correctly
and i just checked, i have a few memorex cdrw discs with stuff and of course they do have some issues and takes a few minutes to get working at times