I don't have a Windows PC, and so can't use SFOInfo (not that I'd be super happy about downloading random .exes from websites with no TLS and running them on my home PC even if I did), but it turns out the format is super-simple, so I wrote my own SFO extractor in Python in, like, an hour. All you need to do is mount the iso and point it at the mount point and it will spit out a file called sfoinfo.txt in a format that I think you can just copy-paste into a PSP dump. Or a PS3 or PSV dump, I think. I haven't checked since I don't have the hardware to dump PS3 or PSV games yet.
It's not fantastic Python, but it has no deps and does the job (and you can read the source). Have I missed an edge case? Does this want to go on the Wiki? Here's a gist: https://gist.github.com/YurgenJurgensen … 1731f64224