AT3 and PMF

I have searched the forums for about an hour and found nothing relevant to my question...

I would like to know if anyone has any knowledge of making these files for the PSP?

PMF- nobody outside sony knows how to make them, but there are a few floating around from sony
AT3- here's a link i found after a few mins of searching -.-
http://www.dcemu.co.uk/vbulletin/showthread.php?t=8805
oh well, you gotta know what to search for i guess, enjoy

oh, and the link also has a guide on customizing eboots with it, which might be useful as that kinda sounds like what you're trying to do? anyways, hope that helps

edit- another one if you prefer it-
http://www.dcemu.co.uk/vbulletin/showthread.php?t=7372

Thanks alot PSP_Newbie!