From kltush:

X Installer Beta - For CFW 3.71+
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This is a simple application that allows you to easily download and install Homebrew etc. directly on to your PSP.
To use, see the instructions below.
If anyone has any problems or suggestions feel free to contact me at klutsh@x-projects.org

If you want to submit your Homebrew to me just send an email to the above address.

Hope you like it and thanks for downloading,
Klutsh

To install:
Just copy the PSP folder to the root of your memory stick.

Controls
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D-pad: Scroll up and down
Cross: Launch selection
Circle: Return from selection

Note: I know the file count is off.