Hi all,
Here's some good advice from someone who's done it wrong once and lost a stock file.
Right after you read your PCM/ECM/TCM for the first time, save the file as "STOCK.hpt" or whatever you want so that you know it's not a modded file; unless of course it was modded previously. Usually on a known stock file I will use the Operating System part number(s) as the file name.
Then once you've saved it on your computer, go to that file, "Right-Click" on it and select "Properties". Near the bottom of the "Properties" window you will see a check box for "Read-Only". Check it and click "OK".
Attachment 23916
Now you can't write over your stock file by accident!
If you try you'll get an error like this:
Attachment 23918
After you've done that you may even want an online copy of it so you can retrieve it from anywhere. You can upload it to the HP Tuners Repository or email it to yourself with a Gmail/Hotmail/Yahoo mail account for safe keeping.