Just thinking out loud here, but wouldn't unzipping all the files and then placing all the that content into 1 folder do the trick. A mod requires all the files to be centrally located so thats what i would try anyway. Be sure to have a backup just in case something goes amiss.
Also, i would have imagined that there would be instructions located within the zips themselves. You looked?
If not, then perhaps a quick post in the ST mod thread will help you more than on the general boards. Not all folk are clued into each mod, posting to the specific mod thread may be better.

Edit - Also just in case you are unaware. All the mods found on the GC2 site are fan creations. No mods, that i am aware of anyway, are endorsed or supported by Stardock. So keeping all questions pertaining to each specific mod to it's own thread will be certain to yeild you some more constructive help then the general forum community might be able to give.
Also you will find alot of the modding community at I-Mod Productions, i'm sure you would be able to get some help there as well.
http://www.i-mod-productions.com/