That was a long day... but it was rewarding...
I ported the libminiupnpc library from PC to PSP, and added it to PRO Online.
PRO Online no longer needs DMZ to function, any UPNP enabled router will work out of the box with PRO Online now.
I hope you'll soon release a beta: there is no need of many games, otherwise, each guy will be on one game and we won't play at all !
It's kinda a pain to copy the eboot, copy it to psp, decrypt it, copy it to pc again, search for the adhoc match ! If there is a pc tool to decrypt, I'll be able to test much games since I've many friends that have various games !
I hope you'll post the sources of your ported version to allow users to use it !
Do you heard of uOFW ? It's a project to fully reverse engineer to C the OFW to better understand the inner working of the psp and also make a new pspsdk documentation with discovered functions.
If you want to join it and add your reversed prxes and soon your adhoc matching reversed, feel free to join #pspgamerz on irc.freenode.net: _Felix_ will probably accept your help !