However I accidentaly deleted %APPDATA%\Microsoft\Signatures directory.
#1 - Have you checked your <Recycle Bin> to see if the folder is still there and recoverable?
#2 - Failing the above, contact your IT dept and have them provide you with the sigs (unless you have an accessible backup)
Karl Timmermans [Outlook MVP] "Outlook Contact Import/Export/Data Mgmt" http://www.contactgenie.com