It may not be the best solution, but since the .com files are in a self-extracting compressed format, it is possible to create different versions by re-compressing them with different settings. The latest version of the game is available here, if you do not have it yet. Using this utility:
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You can uncompress the selected .com file with this command (replace the .com file name and path to epcompress.exe as needed):
  epcompress -x bouldash.com bouldash.com
Of course, this uncompressed file can also be used as a separate "version" Compression is done as follows:
  epcompress -m2 -9 -nocleanup -borderfx bouldash.com bouldash.com
This will produce an identical copy of the original .com file. Different files can be created by replacing the -9 with other numbers from -1 to -9 (not all will necessarily result in different files), or using -m0 or -m3 instead of -m2, or replacing the -borderfx with -noborderfx, or the -nocleanup with -cleanup. Of course, these will affect the file size, loading time, and the border effects when the program is started.

O.K. , I think i've got it 
Thanks again, IstvanV !

I think, i will do this trick also on some other dumps, wich have the same crc32. (most trained dumps)

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