what error message are you getting?
you should source the file first then run the main function
type: source “/fracture location/Fracture.mel”; Fracture();
you can then drag that line to the shelf.
or you can put the fracture in your users folder and just type Fracture() in the script window or create a button.
example: C:\Users\BrianKeffer\Documents\maya\2010\scripts
keep in mind that mel is case sensitive.