This is the Fonthack Noob Pack by edog046.

Combined with "Fonts from Birdman's Fontpack," and the instructions below, this should help you to learn the basics of installing your own custom fonts on your PSP.

1) Download his Fonthack Noob Pack.
2) Extract to your PSP's memory stick.
3) The root of your memory stick should have only a handful of new additions inside it.
4) Take note of the Fonthack folder.
5) Unplug your PSP and go to the photo section, and hit "x" on the fonthack folder. DO NOT HIT "START" OR RUN AS A SLIDE SHOW.
6) A black screen with writing should come up, hit "o" and count to ten, then hit "home."
7) Plug your psp back into your computer
8) Download "Fonts from Birdman's Fontpack."
9) Extract it anywhere. Go into the "Fonts from birdmans fontpack"
10) The folder should have a lot of font folders.
11) Those are the folders of all of the fonts. Pick one and go into the font folder that interests you. There is a folder called fontmod in each of those named folders, so go into that folder.
12) Finally, copy that file, and paste it in the FONTMOD folder.
13) Now, just unplug the PSP from your computer, restart it, and your custom font should now be installed.
14) Give yourself a pat on the back, because if everything turned out well, you've just completed edog046's tutorial. Congratulations!

If you have any questions, you can look for him through the source link or email him at (ethanc464 at hotmail dot com). Thanks again edog046!