Well, that was quick. Several hours after brethren released a proof-of-concept download of becus25's custom PSP firmware running on DevHook, the former PSP developer (brethren) has just followed up with news that a fully functioning version is now ready for use.

This collaborative work by brethren and becus25 is the PSP Custom Firmware 1.62 IE-D Update 2 adapted for use with DevHook. This fw should have all the functions it was last reported to carry, although we (as always) advise prospective users to view the file readme for important instructions. That's all for the moment - stick around in case these two devs come back with another update. Enjoy the download!