What you'll need:
Smart Audio Converter
Halo Mapping Tools
Step 1: In this tutorial I'm going to use the ghost at blood gulch (whatta surprise

Step 2: Okay, now that we have the audio file we want in the Smart Audio conveter, look at the "Select Output Format" Pull down tab located near the bottom right, then click it. It should list a bunch of different formats of audio files, find WAV (ADPCM), then select it. Now before you click on convert, look at the "Output Folder" option at the bottom, change it to just the desktop. Now click convert!!! Then when it's done converting, close the Smart Audio Converter.
Step 3: Once you've closed the Smart Audio Converter, open up HMT (Halo Map Tools), then open bloodgulch.map (or just bloodgulch, depending on how your maps were saved), you should know how to open a map but if you don't or do I'm gonna tell ya. Go to file then click open, then navigate to where your Halo Folders were saved, once in where your Halo Folders were saved, click on the folder named MAPS. Then there's all your maps. Double click on blood gulch then that's it, your blood gulch map should of been opened. Now it's time for changing that audio! Scroll down to the title "[snd!] Sound (333 items)" and click the "+" sign next to it. Now a bunch of things should of came down under "[snd!] Sound (333 items)", now scroll down until you find "sond\sfx\vehicles\ghost_lp", click on that. Now over to the right, under "Tracks contained in the selected structure", you should see "-hvrlp", click on that, then click on "Import Track", then load up the file you converted and saved, then save your changes to the map (NOTE: YOU MAY HAVE TO IMPORT THE TRACK ON THE CHUNK TOO).
Step 3: Load up halo, play, get in ghost, then listen to Snoop Dogg or whatever... LOL

Hope this tut works and helped some poeple out there. CYA!!!
