How can I install games into my PSP?

How to install ps1 games in .pkg format on PsP?

• So i downloaded a game from PSN (syphon filter 3) and it is in .pkg format now some tutorial says that you need to extract it using PSP PS3 PKG Decrypter Extractor so after extracted the files is on a folder whic contains a subfolder named CONTENT and some pics and inside the content folder had a subfolder also... Then I search the net and found the US KEY.BIN for Syphone filter 3 (US) then back to the tutorial, it says that you should put the KEY.BIN tothe game (syphon filter 3) then renamed the content folder to anything, (btw the content folder contain the eboot.pbp) but when I copy the content folder to my PSP's Game folder and start the game, It wont work... it just restarts my psp can you all help me? i really want this game!

• Answer:

  Or you could just plug your PSP into your PS3 with a USB cable and transfer it from the XMB that way like everyone else does. You just have to do it from the context menu (hitting Triangle) before you install the game to your PS3.