http://www.newgrounds.com/portal/view/416601

Halfway There - 5 points - Finished part 1 of A Bahamuts Christmas Tale 2
Classic Intro (Secret) - 5 points - You found the original intro
The Playstation Sound (Secret) - 5 points - Wait... How did a PS2 play that?
 

The AoBs are different lenghts, but i found a way around it a bit:

Halfway There is very easy, just let it run its course, ignoring it as the voices, story and everything is very bad

The Playstation Sound is easy. Right at the beginning of the movie press Tab and there will be a yellow button highlighted. Press it :)

Classic Intro...i dont know how you do it, but here is easier way:

Search for: 96 21 00 00 54 68 65 20 50 6c 61 79 73 74 61 74 69 6f 6e 20 73 6f 75 6e 64 00 07 01 00 00 00 00 63 6f 6d 00
Replace with: 96 19 00 00 43 6c 61 73 73 69 63 20 69 6e 74 72 6f 00 07 01 00 00 00 00 63 6f 6d 00 02 02 02 02 02 02 02 02

This turns The PS Sound into Classic Intro, just click the button again and it should work