Creating own fresh build

Hi there I recently purchased TGEA and was successful to compile it.The problem is that unlike TGE1.5 which come with the fps starter or racing TGEA comes with the demo.The problem here is that I cannot change anything in the build to create a fresh new build.Is there a way that I can have a fresh new build with all TGEA features inside a fresh build and not have readonly files.I have been scratching my back all night.