How to pack your Mission

You should pack all your assets into a seperate directory following the same structure as can be seen in the various origina PK4 files. Then you can use any application to pack it into a zip file (Winzip, WinRAR, etc.). After it is packed you just rename the zip extension to pk4.

The result can be dropped either in the darkmod directory or in the base folder of your Doom 3 installation.

Alternatively GarrettLoader can handle installation of Doom 3 and darkmod maps (zipped as per above) as part of its core support. You may also want to read GarrettLoader For Authors available to download here: http://www.potterdevelopments.org.uk/fm/downloads.pl?downloadgroup=Tutorials which contains more information on enhancing your maps for use with GarrettLoader.