.MDF is an Alcohol 120% CD image file. One of several CD image formats that Alcohol 120% can mount.
Alcohol 120% is used for media backup.
IsoBuster Data Recovery Tool can interpret these files directly.
I've found some Postal 2 ISO's, but there are several different available. Which of these do you have?
Postal 2: Share the Pain ISO
Postal 2: Apocalypse Weekend AIO ISO
Postal 2 + Apocalypse Weekend ISO
Either way, you'll need to burn these file's to a cd using any cd/dvd burning software such as →
* Nero
* Roxio Easy Media Creator
* Alcohol 120%
* BlindWrite
* WinISO
* PowerISO
* UltraISO ME
* Ashampoo Burning Suite
* GEAR Pro Mastering Edition
* CDRWin 6.1
* CheetahDVD Burner
* CheetahCD Burner
* Magic ISO Maker
* NTI CD/DVD Maker 7 platinum
* Sateira CD/DVD Burner
* Prassi ONES
* D-Scooter
* Padus Disc Juggler Professional
* DVD Mate Pro
* Daemon Tools
* Virtual CD
* Aurora Media Workshop
* Cute CD/DVD Burner
* Smart DVD/CD Burner
* ALO CD/DVD Burner