I found the PSP issue. Your tool hangs when it finds a corrupted ISO. After I deleted it, the tool scanned the games.
PS2ISO is now scanned properly (.BIN.ENC and .ISO)
I found that your tool cannot detect split ISO (*.iso.0).or the .ntfs[ files stored in /dev_hdd0/tmp/wmtmp
Also the fetcher is not reading the content in /dev_usb000, /dev_usb001, /dev_ms, /dev_sd, /dev_cf, /net0, etc.
BTW other supported ISO extensions are: .img, .mdf, .bin
The cue files are preferred to mount the PSX games when they are available: .cue, .ccd