I have not read all 11 pages of this thread, but I clicked the link on the OP and felt a little baited and switched because 1) I didn't think advertising commercial scripts on the forum was allowed and 2) the post mentioned that donations would be appreciated. To go from an expectation of free to a cost of 50 pounds is a bit of a shock.

If this mod was originally written as a free (libre and gratis) mod, can I still aquire the files for that version? Will it work with 1.3.9g?