I just read:

Brought to you by the schroedes (aka scoder), this is Sony's nice program to sync tunes, photos, videos, RSS feeds, etc. to your PSP. It usually costs 20 or 30 dollars, but there is a crack in the RAR file. I recommend reading the README.txt, which is also in the RAR archive. THERE IS A MISSING PART OF THE README! right after the installation, run the manager, and type JT-85SFDJ-33WXFB-XZ577W as the serial. fill out the registration until the last screen, where it will tell you that the key is invalid. hit cancel, and then follow the rest of the instructions.

How do i start all over to the point where it ask me for reg? uninstalling and installing dosent work.