A: Yes – with a PSP running CFW and the “UMD Dumper” homebrew app. That’s the most legal way to get an ISO.
These files can be downloaded and played on: psp iso archive.org
A: Those are multi-part RAR archives. Use 7-Zip or WinRAR to extract part 1 → full ISO. A: Yes – with a PSP running CFW
If you own a physical PSP, you need Custom Firmware (CFW) like PRO-C or LME. psp iso archive.org