Thanks for the links Drift.
Looked through teh first one a bit earlier but still trying to sort out what I need to know - hopefully nothing, it's going to be spot on when I get it!! (yeah right!)
Hated teh 2nd link mostly becasue I realised that I paid about £20 more for it 3 years or so ago than it costs now

Following on to get the tech info though
I'a a skinflint and want to save every penny I can that's why I try and sace weight as shifting every extra kilo costs more petrol even if only a few drops. I even turn off my rear windows and interior fans as soon as possible so that I can save fuel - everything electrical puts a demand on teh alternator which is powered by teh fanbelt which is driven by the engine...is my thinking.