Which file type does psp support

i want to play MP4 files, but it wont play from the memory stick .I have even downloaded the lates "On The Spot" show in the PSP format a even that wont play. I have downloaded games with the file type .rar. What file formats does the PSP support, and where do I put the file so that the PSP will recognize them ??

thank you

check this user guide http://manuals.playstation.net/docum...ent/index.html

• Memory Stick Audio Format(ATRAC)
• MP3(MPEG-1/2 Audio Layer 3)
• MP4(MPEG-4 AAC)
• WAVE(Linear PCM)
• WMA
• Memory Stick Video Format
  
  • MPEG-4 SP (AAC LC)
  • H.264/MPEG-4 AVC Main Profile (AAC LC)
• MPEG-1 (MPEG Audio Layer 2)
• MPEG-2 PS (MPEG2 Audio Layer 2, AAC LC, AC3(Dolby Digital), LPCM)
• MPEG-2 TS (MPEG2 Audio Layer 2)
• AVI
  
  • Motion JPEG (Linear PCM)
  • Motion JPEG (μ-Law)
• AVCHD (.m2ts)

have to make a file call MPROOT or something.also you need the file types .PBP which called eboots so EBOOT.PBP . mostly all downloaded psp games use eboot.pbp and only certain psp firmwares or versions can be able to play some downloaded games.