Installing a multi domain certificate on SBS 2008??

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Hi,

I run a server with MS Server 2008 which has MS Hyper-Visor running 4 virtual servers - Gateway, 2 email/web servers, and a FTP server. The base server does nothing other than host the Hyper-Visor and run DHCP and DNS.
I have bought a GoDaddy multi domain SSL certificate (which supports up to 5 domains) which I need to install on both email servers and then obviously the Gateway server (which has ISA server and controls traffic).
The Gateway runs MS Server 2003, the first email server runs MS SBS 2008 with Exchange 2007, and the second email server runs MS Server 2008 with Exchange 2010. The two email servers handle different domains. The second email server with Server 2008 is the primary mail server.
Can anyone explain how I install the certificate on the email servers and Gateway? Also what is the best sequence of installation?

Many thanks,

Nigel