Setting up a PositiveSSL Multi-Domain

Hey everyone, I was looking at the Forums and knowledge base for my questions. So from what I get
I cannot install my PositiveSSL Multi-domian from Comodo? If I’m wrong please let me know how to install it.
Because my other sites I have on other servers are just a quick few steps and they install. Any help will be great

Multi domain certificates are supported as far as I know, only wildcard certificates are not supported.

Multi domain certificates can be installed the same way as any other SSL certificate: