How do I use a .PK3 file?

[Kookerus]

I just downloaded GZDoom, and I wanted to try out the Aliens mod for it. The mod is a .PK3 file, and I can't figure out a way to run it. How do I get GZDoom to run the file?

[Graf Zahl]

Exactly like you run a WAD file.

[Kookerus]

And how do I do that? There's no man page, no CLI help, I run the program and it comes up with a list of WADs that are in the WAD directories, and the PK3 isn't on there.

[Gez]

[wiki]Installation_and_execution_of_ZDoom[/wiki]

The thing that pops up is the [wiki]IWAD_selection_box[/wiki].

[Kookerus]

Okay, thanks!