I'm getting the exact screenshots shown here, and followed the directions there despite the model difference. The BIOS had a different serial number for some reason, but it was an alphanumeric string still. We checked that it did persist after a restart. However, this didn't fix the problem.
Some suggest to run a .cmd file in the psp directory to auto-update everything, but I don't want to do that, I want to do them one at a time.
How do I get PSP to successfully install?