The way many of these these batch-to-com and batch-to-exe "compilers" work is by attaching an executable header to the submitted batch file. The header contains an interpreter rather like cmd.exe or command.com, but often it will only handle a subset of the full range of commands. When the executable file is run, the interpreter gets to work on the attached embedded batch script I guess one could examine such a "compiled" com file in a hex editor and view the original batch file therefore, and also determine where to cut in order to retrieve it.
Of course it a true compiler was used, and machine code produced, a disassembler would need to be used, but it wuld be unlikely to produce anything very comprehensible.
