Going off most hacked games, I'm guessing there'll be a file called cm4.exe on the CD (in a folder called crack as suggested above).
Copy that file and put it in the games folder on your PC (e.g. C:\Program Files\Champ Man 4\)
This will over-write your existing *.exe file and you should be ok from there.
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I'm a little teapot short and stout;
Here is my handle, here is my ... other handle?
sh*t, I'm a sugar bowl!!
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