Happy holidays hurricane3
Sounds like you have a similar set up to me H3.
Bare with me for the road I took - not very scientific, but it works:
My fs9 was also on 'C'- so every time I attempted to install on D, all the PC wanted to do, was repair or uninstall.
Here's my solution:
1. Temporarily alter or rename EVERY installation you already have on your machine.
So if it's named; Microsoft Flight Simulator 2004, just change something to fool your PC into believing it's not there.
Just one digit will suffice for this; e.g. oMicrosoft Flight Simulator 2004. that 'o' makes it unrecognisable.
2. Now go to C:/UsersAdministrator/Application Data/Microsoft or wherever your FS9 folder hoding your FS9 cfg is housed, then temporarily change the name of this folder also. e.g.; oFS9. (My only reason for punching in the 'o' instead of any other letter is that I'm quite forgettful and always use o as a way of recognizing an ORIGINAL something or other. LOL.
If you've covered the above steps you can now freely insert disk 1 and you'll then be prompted to make a new install.
I now have 6 installs. To avoid complications with additional copies, I permanently renamed each one. They all run fine as long as the main fs9 folder exists on the PC.
I still can't figure out how to have more than 1 FS9 folder, but having the same cfg for all my sims is not an issue for me.
Hope that helps some - please give me a jolt if you're still not sure somewhere.
Regards,
Nigel