Hello,
I put together a little python program to automate the installation process of BTW for those who like to use the command line.
https://github.com/retroj/btwpatch
I've had some thought of expanding this to be a general mod installer for minecraft, but I would be just as happy to pass this project on to someone else in the BTW community if anyone is interested. Let me know your thoughts and whether it works for you, thanks!