Mustafar and Kashyyyk in their current forms are not ready yet. I know Takhomasak is redesigning both planets for his Sunrunner II server. He did say he would probably release publically but I would bet not for a while yet.
sorry for the late reply but I have been on my honeymoon. The .tre files if you are using Zonamadev then they are located in the Desktop Folder SWGEmu.