I know very little about map making so I would go to gametoast also, but I believe you copy the files you want, for example, if you want the sky there is a cor.sky file I believe. Put this in the assets folder of your map I think. Double check the getting started guide. I know you can do what your planning on doing but I dont know how to do it, I tried doing the same thing on Jabbas but I never figured it out, as I said before, go to gametoast.com and go to the forums and then the modding section and ask.
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Chad Dumeer, Deus Ex: "When government surveillance and intimidation is called "freedom from terrorism" or "liberation from crime", freedom and liberty have become words without meanings."
"Es lebe die Freiheit!"(Freedom lives)