it appears you have successfully downloaded a game from somewhere for free, but regrettably the uploader was a newbie who did not know how to do it properly. In this case, you will unfortunately have to take your query to another forum, because for various legal, and sometimes moral reasons, we do not provide support for pirated games here.
If I am however somehow mistaken, you can follow these two wise pieces of advice provided by Steven:
Steven wrote:that .pkg is from the Media Go if you want to make it work you need to transfer it via Media Go
Steven wrote:and also if you're using your PSP to download games from PSN
once it finish the download it will then automatically install (so there's no way that would in .pkg)
Also, I would like to point out that bumping your own threads is not encouraged at all by the forum rules, and is in fact considered spam by moderators.
And one last thing: reading your signature, I quite believe you are one those people who "just say they buy the game for their psp but they really download it off the net
". We are not the police here, nor the authorities, but rules are still rules and as such need to be followed.
Yours truthful friendly neighborhood mod,