Then check out my program “PRG Starter”:
http://user.tninet.se/~jad615g/prgstarter/
It analyses any 8 bit commodore file and starts it with the right emulator and the correct settings…
sequential files supported… that format is very rarely used…Also has a very different disk-layout.
If it also would really read the non-listed disk-contents then thumbs up for that!
Now a program that can translate .prg files to assembly and being compiled back to .prg files…
(I made an attempt once to do this for Turbo-Assembler format, but lack of time and different priorities cut me off)
Seq files on disks are stored similar to prg files (apart from the loading address), but on tapes they are much more different. I don’t know if there is any other program that can convert a seq in a tap to .seq.