Board Thread:Questions and Answers/@comment-24597759-20140227024418/@comment-198.228.228.161-20140307170950

TheGreatCanadianWookiee wrote: Put it in the mods folder inside the tekkit lite folder. With forge mods never touch the .jar file. From the Big Trees Mod 1.4.6b

"Manual Installation

This is not a Forge mod. Do not put it in the “mods” folder. Open the BigTrees zip file that you

need and copy the contents (should be a bunch of class files and maybe some folders) into

minecraft.jar or minecraft_server.jar. If you are installing to the client you should delete the

META-INF folder. If you are installing to the server, do not delete the META-INF folder."

Tekkit lite is built on MC 1.4.7, BT 1.4.6b i supposed to work with MC 1.4.7

And the above instruction was followed, and the mod does not work.

Which is the gist of why I posted the original question.