Installing Metric Template?

I already have Revit installed, but I don't have the metric templates installed. Do I have to uninstall 8.1 and reinstall the program?

No just open the cd and copy the metric library and templates to your library location.

Once Library and Templates are copied you probably will want to record their location in Settings | Options | File Locations. BTW Metric Libraries may be added to the list w/o removing Imperial libraries.

Thanks for the help.