Map file support

[xirzec]

One big difference in the downlevel output is there aren't any map files.

Maybe it's too out of scope, since the original offsets would no longer line up?

[sandersn]

Would it be enough to copy the original map files? I don't know how good map files at recovering from incorrect information -- probably not that great.

[xirzec]

Hmm maybe that would work well enough? Worth a try anyway