I am finally going to move to Win7 after ordering a Samsung 840 Pro SSD. I know it won't improve frames but if FSX will load faster (that's what I keep reading) it will be worth it.

Anyway, right now I have a 2 drive system (both XP 64 bit), FSX on C and everything else on D. To avoid reinstalling FSX (it's grown to over 200gb and would take me weeks to do), I plan on copying it to the SSD. I read somewhere that as long as I change the drive letter of the SSD after everything is moved and the "C" HHD is removed, Windows will know where to find it. However, if FSX is currently installed in C/program files/FSX and I plan on installing it in C/FSX on the SSD, is that going to be a problem? I tend to think it will. And which version of 7 64 is best? 

Whatever you do , do not install FSX in the default location. I would suggest you to partition
 it and give the operating system a seperate drive and keep a seperate drive ONLY for fsx and your other stuff. For example drive c for the os and drive D for other stuff.

 

Now , install fsx in your named folder in D drive . If i am not wrong , you dont take the headache of running things or setting things for " run as administrator" , It is really annoying. And even for the ADD-ONS do not install in default location !!