Mime and Brittany can testify that I spent HOURS working on this last night and I finally found this tutorial that worked for me(it was the 3rd one I tried)
This was posted by jackleone on gamingcrazy.net and he got it from muratcan on psp-updates.
OK....here we go
Step 1, WinMenc
1: Open up WinMenc
2: Go to add files
3: Find the video you want to use
4: Go to load profile
5: Select PSP AVI profile
6: Go to the audio tab
7: Select no audio on the drop down menu
8: Go to the video tab, and make sure the FPS is 29.970
9: Go to the batch tab
10: Select your output folder
11: Hit encode
12: Now go back to the audio tab
13: Select MP3 from the drop down list
14: Go to the video tab
15: Select no video.
16: Now go to batch and encode this.
17: You should now have two files. The video and sound separate
Step 2, WAV converter & Virtual Dub Mod
1: Open up the WAV converter
2: Go to add, then change file types to all
3: Find the MP3 from your video
4: Select output format as WAV
5: Hit start
6: That’s the audio out of the way
7: Now open up virtual dub mod
8: Go to file , then open video file
9: Find the video part of your file
10: Now go to save as
11: Make sure its going to save as an AVI
12: And that’s that. You now have the source files ready
Step 3, Sony UMD Tools
1: Open up the UMD Stream composer.exe
2: Go to new
3: Name it what you want. Click next
4: Tick the PSP Movie format (for game) bit.
5: Change the max clip size to 2mb or less
6: Hit finish
7: Go to video source
8: Find your video file made earlier with Virtual Dub Mod
9: Go to audio source
10: Find the WAV you made earlier with the MP3 to WAV converter.
11: Now go to run at the top
12: Choose encode + multiplex
13: Hit start
14: Well done the .mps has been made
Step 4, .mps to .pmf Converter
1: Go to My Documents (well yours)
2: Go to the UMD Stream composer folder
3: The .mps file is in here somewhere (I forget where exactly!)
4: Now rename the .mps file to gameboot. (intro if we're talking coldboot)
5: Put it in the same directory as the .mps to .pmf converter
6: Run the converter (Click Run Me)
7: And your gameboot.pmf should be created (intro.pmf if we're talking coldboot)
Put the Coldboot in your system/intro folder with the other cintro files
I apologize in advance to the mods if I posted something I shouldn't have, posting any kind of tut is new to me.