I have heard of Insight owners up north installing engine block heaters.

Check out: http://www.hondaautomotiveparts.com/...hidmodel=Civic

They show a block heater that should work with your Civic.
Ford should have something that would work in the FEH.

Most of the warm air intake mods are all home-brew, get the proper length of preheater hose and find a heat source (converter?). This is mainly to help MPG in colder weather.

Good luck.

Regards,