Make sure you export the private key. Otherwise you're
basicaly working with half a certificate, not a full keypair.
Although this is not a security best practice, I like to give my pfx
file a name that reminds me later what the password I chose was.
To import the certificate keypair onto another 2008 server, open the
MMC, right click in the white open space of the personal store,
select All Tasks and Import. . .