Be sure to edit your sipcfg.ini and contacts.txt.
:  sceNetApctlConnect returns 8002013A «»(the error?)    -=- This is deu to the fact that the PSP remembers the networks with an ID number what could be different because of deleting networks.
Solution: remove all networks and put the network you want first. (new version has netwoprk selector, so possible no more this problem).
Initializing camera... (Please ensure it is plugged in) «» (I chose the function input=file)- =- Is always started no matter what kind of input you choose.

And about the .prx i know nothing, but hoping this helped you.