Hi, I just dumped a rare version of SOCOM: Tactical Strike Pre-Production UMD UCET-00904/v0.01 for PSP. I've been told to contact you about this dump on reddit.
At first I used your guide to dump the game but the ISO refused to work. So I just pulled the ISO off the UMD via copy/paste, now it works like a charm.
I'd like to post it here too.
Archive link: https://archive.org/details/ucet-00904-0.01