A Installer.app equivilant for the PSP has been released PSArchiver. This app allows you to download Homebrew straight onto your PSP over a WLAN connection.
Here are the release notes:
What does this homebrew do?
Do you ever wanted to download homebrews without the use of a computer? Then it’s your turn! Download a lot of homebrews right onto your PSP. Everything you need is a PSP and a WLAN Connection. Then, connect to the AP and start downloading your favourite homebrews.
List the homebrews alphabetically, search for them, have a look at other’s favourite homebrews!
How to use?
All you need to do is to download this piece of software: psarchiver.freehoster.ch/psarchiver/psarchiver/EBOOT.PBP. Place it in X:PSPGAMEPSArchiver for clarity^^
When you have a look at a multi-page-category, press L and R to go to the next page(s). Press X to get to the “Info-Screen”. Press X again to download the homebrew, circle to cancel.
Please post missing homebrews as a comment to the most recent entry here: psarchiver.freehoster.ch. Also additional feature-requests go there. Thanks!
To download: CLICK ME