Okay what i would do is go int the ftb launcher files and delete the folder that says lapitos etc.. then launch the pack without any additional modifications, then add tinkers and fix the ids again make sure the ids that you change are going into spots that do not have any other item with the same id. If this doesnt work then im not sure what to tell you withoit having to downoad extra tools.
And the proper place to post this sort of thing would most likely be in a discussion thread, this isnt a discussion thread