Colin
A few links to help. There's loads more on these subjects to find.
Radiator & Hot air mod
http://www.insightcentral.net/forum/vie ... php?t=6072
http://www.insightcentral.net/forum/vie ... php?t=1970
http://www.insightcentral.net/forum/vie ... php?t=2546
Brake & Clutch Switch mod
http://www.insightcentral.net/forum/vie ... php?t=4489
http://www.insightcentral.net/forum/vie ... php?t=3951
http://www.insightcentral.net/forum/vie ... php?t=1678
Block heater
http://www.insightcentral.net/forum/vie ... php?t=4472
http://www.insightcentral.net/forum/vie ... php?t=1310
http://www.cheaphondaparts.com/shop/ins ... I23270.pdf
http://www.handa-accessories.com/insight.html
I have just bought a block heater from US for my wife's car, hasn't arrived yet. (Block heaters are only available in 120v and are not available in UK) It can still be run on 240v with addition of a 600v 6A diode in series to cut mains by 50%
I think they are about 500W and most people use them for 1-2 hours to preheat block, so call it 5-15p to get instant heat on very cold days!
Peter