i have a backed up version of a game - 5 files and I have no idea how to extract them to 1 .iso ... when i move to the second file it asks to over-write the existing .iso, not add to it.
Backed up by whom? Not by you apparently.
How did you obtain the "back-up" and what game is it anyway?
i'm closing this thread due to its "dubious" origins. if you archived the files, you should know how to extract them as well. also, this has nothing to do with transcoding.