Although not too useful yet outside of the "cool, I did it" factor... I did confirm myself what others are reporting on the net... you can get the VAMPIRE, WIPEOUT, and RRACERS intros to play on your PSP using the PDX releases and the following instructions:
1) Grab the Hello World, PSP! EBOOT.PBP
2) Grab PBP Explorer
3) Mount your Paradox WIPEOUT (or VAMPIRE or RRACERS) image using Alcohol 120% or a similar application.
4) Open the HELLOWORLD EBOOT.PBP
file in PBP Explorer
5) Right click on each file listed (for example, PARAM.SFO) and then click INJECT and select the corresponding file from your WipeOut Pure (or Vampire/RRacers) Paradox mounted image.
6) Continue to do this for all the files listed, replacing them with the INJECTed ones from your Paradox images.
7) Make sure
the CATEGORY section to MG
instead of UG.
8) When you have inserted all the sound/graphics, etc then SAVE the file as EBOOT.PBP
. Your WIPEOUT PBP file should be 740 KB (758,013 bytes) if you did it correctly, your VAMPIRE PBP file should be 671 KB (687,381 bytes), and your RRACERS will be 563 KB (576,817 bytes) in size. Files listed in PBP Explorer that don't have a corresponding Paradox image file can be skipped in the INSERTing process.
9) Now, put your PSP in USB mode connected to your PC, and go to the /PSP/GAME directory. There, make (2) subdirectories, titled WIPEOUT and VAMPIRE and RRACERS. If you only are doing one of them, then just make the one for the intro you did above. Then put the respective EBOOT.PBP files you modified above (with the game files injected) into the corresponding game name directory.
10) Exit out of USB Mode, and then go to the GAME/MEMORY CARD icon in you PSP and you will have the intros to the VAMPIRE and/or WIPEOUT and/or RRACERS games to check out. Of course you can't play them yet... but it's still cool, eh?
Finally, YES this works on a PSP with v1.50 firmware... not just v1.00 PSPs. Attached below is a pic of the Intros available to watch, of course the "homebrew" one doesn't work on my v1.50 PSP though but the rest do nicely.