I have a Dell P4 machine with 2 hard drives. FS9 is currently loaded on the C drive. Can I successfully load and run FSX from the D drive or will I end up with a mess?Thanks!!!Steve

Assuming there is enough room on the drive, then FSX can be installed on whatever drive you choose. It may be easier for you to install it to its default location if you intend to use a lot of addons later though, as doing so would make installation of many of them easier if they use auto installers. FSX can also co-exist quite happily alongside FS9 on the same drive