Google maps and Request Tracker

Hi,
has anybody done any work adding a google map link to a ticket in RT?

I record the postcode/zipcode as part of the address in a custom
field, it would be nice
to be able to have a link generated on a ticket which points you to
the address in google maps.
I guess I should have my postcodes in their own custom field to make
this process easier?
Any suggestions very welcome.
thanks
Mike