New to mods...

Sorry I'm new to mods, but I want to install the Parallax mod.
Can anyone give me a samll step by step walkthrough on how to install and uninstall the mod?

thanks

Put the pk4 file in a folder youll reconize, then place the folder under your doom3 folder, not inside the base folder, then ingame click the mod button and load the the folder you named, then the game will reload then you can do whatever you wish cause itll be loaded.