Multi-Site Sub-domains NSI and UCC SSL Certs

We have a sub-domain Multisite Install which is running on Apache - Plesk 11 with NSI enabled. Because we're hosting other sites through Plesk, I would like to set up SSL with a UCC cert, then secure sub/mapped domains on multisite as well as Plesk hosted sites outside multisite residing on our server.

I read several Posts, but most are at least 3 years old. Do we have a step-by-step for this yet?