Painkiller: BOOH Extracting files from their "packed files"

[tjockskalle]

You probably know that Doom3 has those large .pk# files. Which get extracted in game. the .pk# files are easy to extract with winrar. But Painkiller uses some other compression.. Does someone know how to extract those files? (Theyre called .###) and not extractable with Winrar.

Pls help . And yes, i officially own the game, and i do not have illegal purposes with it, only for personal use.