Just going by memory...
These files use calls and one or two arguments.
For Decompress, it's just Decompress [filename], where filename is the .grp file.
For CmpUtil, it's
CmpUtil [target] [filename]
Where target is the destination .grp file and filename is the file you are compressing into the target.
You can write .bat files to string several of these commands together so that you don't need to fuxor with the command prompt all day.
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