YEAH the link is broken I think... I've been there in the same quest you are in already...
You might wanna look into my POST (MUSIC IN UT)...
-I used a ModPlayer to transfer a .WAV file ito a .IT file.
Then, in UnrealED, in the MUSIC browser, you IMPORT the file and save it as a .UMX file, which is the format UT uses in the game.
-You then open a MAP in UnrealED and in the LEVEL PROPERTIES, under AUDIO, CLEAR the song used in that particular map and USE the highlighted in the MUSIC BROWSER.
-SAVE and PLAY the MAP.
The problem I encountered: when you import the .IT file in the MUSIC BROWSER of UnrealED, the song loops every 30 seconds or so... I cannot find a solution.
Let me know if you find any solution...