As it says in the Mod's readme, you need the Image Mod, a collection of lots of new images. A mirror is located here:
http://imagemod.spaceempires.net/
Grab the latest full Versions of all the files and extract them into the appropriate Pictures subfolders, based on the name of the pack. So Components Pack goes into Pictures\Components. You do want to overwrite Components.bmp.
The Image Mod does not change any default images, only adds new ones. So, it is perfectly safe (and a good idea!) to install the packs into the default folders. They will be used automatically by all mod that make use of the Image Mod, which is nearly all mods.
