OK, this is what I did:
Downloaded MobiDeDrm.py
ran the command MobiDeDrm.py myfile.prc outfile.mobi '#XXXXXXX'
Response "
Error: Invalid PID checksum"
So I re-read the instructions and downloaded MobiPocket reader, which would not accept my prc (it says it is corrupted but K4PC opened it fine)
Then I used the PID from MobiPocket Reader and it gave me the same error.
Any tips/ideas? Thanks for taking a moment to assist me