Cert Export import

Is it possible to Export a certificate from IIS4 and import into IIS6 or do I
need to have it regenerated through the certificate authority?

Link to docs are helpful, I already have these

http://support.microsoft.com/kb/816794/en-us
http://www.microsoft.com/technet/prodtechnol/WindowsServer20 03/Library/IIS/8d3bb71a-0a7f-443f-8084-908d0dab9caa.mspx?mfr =true

http://support.microsoft.com/kb/814866/en-us

http://support.microsoft.com/kb/324904/en-us