DooM Legality

Im working on a DooM WAD for PSP for some time now. Is it ok to use DooM classic music, because I have found it very hard to upload other music into the levels. When i do it comes out with no music. Is there any way to place songs into DooM levels?

P.S. I dont care if Legality isn't a word.

get WinTex and an midi then import that midi into your wad and hopefilly you will hear something

forget it. Doombuilder is ****ing up on my computer. Im sticking with FPS Creator.

btw, is there any coder out there that can port a game made from scratch?