My procedure for doing a complete FS9 reinstall, which I do about once or twice a year depending on how cluttered my folders have become:
SAVE WHATEVER YOU WANT TO
KEEP! I can't strees this enough, I have so much semi-rare stuff, repaints, sceneries, fixes and so on that I'd be hard pressed to find again. Also make sure to keep the No-CD patch if you have it, it can be a pain to find it again.
Uninstall whatever addon you can via the Add / Remove Program
Uninstall FS9 via Add / Remove Program
Delete remaining files in the folder (I keep my FS install on a seperate harddisk, so I usually just format it).
Delete the FS9 folder in C:Documents and Settings(windows username)Application DataMicrosoft
Delete the Flight Simulator Files folder in your Documents folder
Run a registry cleaner to get rid of any leftover stuff in the registry database (I use Registry Mechanic)
.. and then I dig out the FS9 cd's and hope none of them have gone scratched since the last reinstall (I'm already using two burned CD
's as replacements
EDIT: Since when did you move to Canada, WILCO?
[Edited 2008-05-20 13:28:25]