When performing a modify or repair installation from the ArcGIS Desktop 9.2 installation disk, the following error message is displayed:
"ArcGIS Desktop Version 9.2.1332 is already installed. You must uninstall the existing version before installing ArcGIS Desktop Version 9.2.1324. Do you want to uninstall the existing version of ArcGIS Desktop?"
This is a known issue that occurs after installing ArcGIS Desktop 9.2 Service Pack 1.