do-dai?

How I installed the DLC (I had no idea what I was doing):

Special note: I was doing this with .iso files.
I'm not sure how to use the DLC with UMD's.

Download DLC pack here: http://www.mediafire.com/?r8sz98z3l7t4zc3
Download Eboot.bin here: http://www.mediafire.com/?5fr9nbw2es1984c
Download UMDgen here: http://psp.dashhacks.com/downloads/umdgen-v400

Patching the .iso:
Step 1: MAKE A BACKUP OF YOUR .ISO IMAGE. IF YOU DO STEPS THREE AND FOUR INCORRECTLY, IT WILL RENDER YOUR .ISO USELESS AND YOU'LL NEED TO REDOWNLOAD.
Step 2: Open up the .iso file with UMDgen.
Step 3: Replace the eboot in the SYSDIR folder with the one downloaded (drag and drop)
Step 4: Save the .iso **AS A NEW ISO**
Step 5: Put the .iso back on your PSP.
Step 6: Name it ULJS00167 if it's Perfect Sun, ULJS00168 if it's Wandering Star, or ULJS00169 if it's Missing Moon.

Inserting the DLC onto your PSP:
Step 7: Extract the NPXP00100.rar
Step 8: Take the extracted NPXP00100 folder and make sure there isn't a folder with the exact name inside that folder. If there is, use the one inside instead for the next step.
Step 9: Drag it to the ".../PSP/GAME" folder.
Step 10: Make a copy of it and rename it ULJS00167 if it's Perfect Sun, ULJS00168 if it's Wandering Star, or ULJS00169 if it's Missing Moon.

Step 11: Hope it works, and if it doesn't, tell me what you did step by step.

I did this on a PSP-1001. I don't know what'll happen on the other models.