The famous reActPSN app designed by Hotz8611 for the Jailbroken Sony PS3 Console v3.55 CFW users has recently been updated to v2.10
This one seems worthwhile upgrade, and it no longer needs any VSH patching, and it seems to be able to 'convert' demo PSN to full game without the need of sharing of any 'edat' or 'rap' files, at least from the reports of users testing it out. -- I personally have no need for this program, so try at your own RISK. -- Backup First!
NEWS SOURCE: reActPSN v2.10 (via) PS3ISO