I recently had to reinstall FS9. I had the add ons for the Vulcan, Tornado and Hercules working fine. Since reinstalling FS9 I cannot seem to reinstall the add ons or even fully uninstall them. The All Programs option in XP has them as entries but marked EMPTY. The uninstall facility through Control Panel seems to crash. When putting in the relevant disc a full install is not an option.Is there a way I can manually delete some files and then reinstall?Thanks

You can certainly delete everything you find pertaining to those particular aircraft, but after you do, try doing a cleanup of your registry. This will get rid of the dead entries, and will most likely fix the problem. Here's the one that I use very successfully:-http://www.zoneutils.com/regheal/index.htm