The sad mac code you got is "a 68k exception" aka: a software error. The diskette and X probably means that the disk is bad somehow, and given how hard it is to make a Mac disk entirely from a PC, I can't blame you.
If you get ahold of another floppy-capable mac with PC Exchange, this is what you should do:
1:Copy the plain unexpanded file to a PC-formatted floppy.
2
ut the floppy in the Mac.
3:Copy the .sit file to the Mac.
4:Unstuff with Stuffit Expander 4.0.1.
5:Use Disk Copy to make a floppy.
This is probably the easiest way IMO.
Not to be stupid, but you didn't try to boot it off a PC-formatted disk, right?
If you get ahold of another floppy-capable mac with PC Exchange, this is what you should do:
1:Copy the plain unexpanded file to a PC-formatted floppy.
2
ut the floppy in the Mac.3:Copy the .sit file to the Mac.
4:Unstuff with Stuffit Expander 4.0.1.
5:Use Disk Copy to make a floppy.
This is probably the easiest way IMO.
Not to be stupid, but you didn't try to boot it off a PC-formatted disk, right?