Does Vista recognize it as an application file? If not try adding .exe to the name and then double clicking it.
EDIT:
Or right click it and see if it has an 'open with' or run as. Try the run as if it is there, and if not go to open with and see the options besides firefox.
EDIT:
Or right click it and see if it has an 'open with' or run as. Try the run as if it is there, and if not go to open with and see the options besides firefox.