Postal 2 was released by Running With Scissors back in April of 2003. The Postal 2 Music tracks are easily obtainable by browsing the Music folder within the game files, they're in .ogg format and all of the tracks are labeled so identifying them isn't a problem. I only made small tweaks to the titles such as "Fire In The Hole(Club Music)" and "Holy Defecation (Easter Boss)".
In case you're looking for it, we didn't include the track "A Fall To Break-Stole My Faith" that you hear on a player in the hotel because the it's available to purchase at this website for the band. The soundtrack consists of 19 tracks and you'll find it in our archive or by clicking here. Enjoy!