Okay, A further update:
After spending the weekend installing a new OS inbetween my wy work schedule, I finally have Windows Vista RC2 running with the latest Vista Catalyst drivers from ATI.... FSX runs a little better it has to be said, and since my last look at Vista, this seems to be running a lot better too! I am getting a regular 25 FPS (locked) on FSX with all my sliders at 3/4 (three quearters) apart from AUTOGEN which is off at the moment. (Autogen Scenery such as trees and ground equipment is the problem, there is some talk in some forums of an updated set of textures but I think this is a long way off)
Anyway, for now I am really happy with it and I can't wait to see what addons (freeware and Payware) start hitting the market first. I see the Photoreal VFR terrain sets have been made available and My Traffix X has hit the market! (Like we need lower Frame Rates! hahahaha) Gary Summons has said Gatwick, Glasgow and Stanstead versions should be released in about a month but there will be no backwards compatibility for the rest of the UK2000 Airports!

Good news though a new faster version of Heathrow will be hitting the shelves in January!
Well that's my FSX update for today.... As always, I'll keep you posted! Ohhhh and for those of you looking for a good site with info on tweaking FSX, try here:
http://www.fox-fam.com/wordpress/?page_id=41