Before we kill this I would like to add one more note here on some investigations into fire extinguishers I have been doing over the past summer. People may want to look at a site http://www.fireboy-xintex.com where they sell automatic discharge fire extinguishers using FE-241 or FM-200 which is the replacement for Halon. I saw one of these units mounted in a car engine compartment at a car show this summer and was very impressed. It had a manual cable that goes into the passenger compartment and also a automatic temperature sensor on the extinguisher itself that will shut off the fuel pump when discharged. This unit was made for boat engine compartments which are usually enclosed so I don't know how being mounted in a car engine compartment may effect it's performance. I believe they were in the $200 price range.