Go to this directory in your DCS install location...

C:\DCS Open Beta\DCS World OpenBeta\Bazar\World\textures\     (or whatever drive you installed on)

Drag all of the .dds files from this folder directly onto the AGM-65.zip file. 7zip will copy the new files to the existing zip file. Overwrite any existing files if 7zip asks you to.

Note: I use 7zip because it is much better.

