I'm not entirely sure if this will work, but try copying your FS folder across (COPY, don't move!) Then download that registry fixer from
here and point it to the new location. Then try... If not, point it back to where your normal FS folder is, and try what Hagar suggested!
I agree with Alex.
I have four instances of FS9 on my 2 hard drives, each on a seperate logigal drive and I've not used
the intallation CD's since the first install.
I simply copied the entire file structure of the original install over to the new location.
I then renamed the root folers ( FS9_Clean, FS9_USA and FS9_Europe ). I also renamed the
FS9 EXE files to the same names as the root folders. Doing this allows each instance to have
it's own CFG files ( they are created the first time you run that :version" ).
As to the registry, I use a utility ( forget it's name ) to change the pointer to the FS9 install
that I want if some 3rd party installer or application really needs to know where FS9 is.
I almost always install new aircraft, scenery, etc to a TEMP directory and then move the
approriate files/folders to the FS9 instance that I want them in.
In my case, I also created "common" Addon Scenery, fsfsconv and Scenery folders on still
another logical drive and madethe approriate changes to CFG files and alias= statements.
So, I have FS9's spread all over the place, created by simply doing a "copy".
I have very little "payware" so the registry entry is not an issue for me.
Paul