I would think that some of u...
 

may have installed a fire extinguisher in your Boxster. I have bought one and would like to know if u attached it and where or if you have it lying in one of the trunks?
Any suggestions for attachment points without destroying the car with wrongly placed holes?

Brey-Krause make a very neat quick release mount that holds my Halon unit in front of the passenger's seat. Not in the way, but easy to get to in a hurry............ Mounts to the seat base, so no holes to drill.