Hellcat
Contributor
PSP developer some1 today submitted his Downgrader for 6.38 into the Genesis Competition 
His Downgrader is based on Davee's downgrader but ported to 6.38 - but also works on 6.35 and 6.31 according to some1.
It is signed, works straight off the original firmware and downgrades your PSP to 6.20, just run and feel good 8)
Supported PSP models: ALL (=1000, 2000, 3000, PSPgo) except 07g/09g models - support for those might be added later by downgrading to 6.35 instead of 6.20, some1 hinted.
Source and download:
http://www.wololo.net/talk/viewtopic.php?f=26&t=6403
I tested it myself on my Slim PSP 2000, one time from 6.35 and one time from 6.38 - and it worked like a charm!
His Downgrader is based on Davee's downgrader but ported to 6.38 - but also works on 6.35 and 6.31 according to some1.
It is signed, works straight off the original firmware and downgrades your PSP to 6.20, just run and feel good 8)
Supported PSP models: ALL (=1000, 2000, 3000, PSPgo) except 07g/09g models - support for those might be added later by downgrading to 6.35 instead of 6.20, some1 hinted.
Source and download:
http://www.wololo.net/talk/viewtopic.php?f=26&t=6403
I tested it myself on my Slim PSP 2000, one time from 6.35 and one time from 6.38 - and it worked like a charm!