Como siempre, arigatou Mr Mirakichi:
http://mirakichi.hp.infoseek.co.jp/software/RIN.html
Y otros programas de este nipon:
BMP Loader v0.1
which displays images up to 480x272 24-bit (based on the GB selector file browser)
Firmware File Explorer v0.1
Using the latter utility it IS possible (but tedious) to dump the v1.00 firmware file-by-file, however, the author did say a utility to do it all at once is coming soon. For those interested though, you basically select the file you wish, press O (JAP PSP only, and O is to confirm the choice), and the file will dump to FILE.TXT. Then simply connect to your PC and rename the FILE.TXT to what the file originally was- that's it! With the exception of examining them,
the 1.00 dumped firmware files aren't too useful without the 1.00 installer which can't be dumped unfortunately.
(se pueden poner los archivos pero no el instalador por lo que nada...)
http://www.ps2nfo.com