Vosman has taken it one step further than PSNabler was able to do, now giving custom firmware users access to the PSN store as well as games from your psp.
Tested and confirmed with a 2000 running 5.03 GEN-C
DOWNLOAD
Troubleshooting:
If you get error 20000001 when trying to sign into PSN (after enabling PSNFucker):
1 Reboot to the recovery console
2 Go to configuration
3 Set “Fake region” to “Debug Type I”
4 Make sure “M33 Network Update” is either “Disabled” or “NOT YET”
5 Try accessing PSN again.