Thanks for the link, thought I was doing something wrong, does seem to be some kind of check to be certain it's an official Panasonic Bios. Perhaps a checksum ?
Before I even started, I updated to the latest BIOS from HP with the EXE file they have on their site. That runs through Windows. When I got the mod from you, I put the files on my USB boot stick and did it through DOS. It has given me an error with every file so far. I briefly looked at the link posted by conghoaxa1. In my BIOS, it does say Vista and not non-vista (which I think it needs to say). If I can get a Dell slic working, that would be best, but if I can only do the HP slic, I just need to know how to do the extra steps to get it to say activated. I've only done Dell slics because I have a Dell Win 7 disc. I appreciate all your help with this.
So, the modified bios has not been flashed ? (This mod has been confirmed year ago) Try to flash from Windows the mod posted by Tito (it's TTAV134's mod) \to activate with HP2.1 slic just install HP 2.1 cert.\