GARMIN Nuvi Boxster Symbol
 

Well I finally found a Boxster SRF file to load into the vehicles folder on the Nuvi.
So if you want to turn your current vehicle symbol on your Nuvi into a Boxster just download the following SRF file and copy it to the \vehicle folder in your Nuvi and then go to tools/maps/symbol and change it in the menu.
:-)

go here http://poidirectory.com/forum/topic/1785.html
and scroll to the bottom of the SPORT list on the right hand side
and choose Boxster S