How to disable 3 finger drag on macbook air trackpad. I'm a novice with command line

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http://askubuntu.com – So I read the other answer for this question but I really was hoping to get a more basic explanation that would make sense to an ubuntu novice. I am running 12.10 on a 2011 macbook air and love it generally but three finger drag activating whenever I try to re-size a window is driving me completely insane. There seems to be a way to disable it, How can I disable the multitouch gestures in Ubuntu? but I lost the last contributor's advice at "...create a shell script" and the other answers didn't seem to work. wrt my familiarity with the command line I understand generally how to add repositor (HowTos)