Don’t you just hate recreating your signatures after a reinstall or workstation switch? So do I, that’s why after my recent workstation switch I decided to figure out how to do this the easy way.
Open Outlook and go to File > Options > Mail
Now click on the Signatures button while holding the CTRL key on your keyboard. This opens your Signatures folder in your profile (C:\Users\<username>\AppData\Roaming\Microsoft\Signatures in windows 7)
Copy all the files in that folder. These files contain all versions of your signature. Do the same on your new workstation and place the copied files from your old workstation there. You now have copied your signature to your new workstation. All you need to do now is assign the signature(s) to the different message types and you should be done.