How do I install an SSL Certificate on a Multisite mapped domain?

Earlier today I took advantage of the SSL certificate that came with my VPS. I was told by my provider that I'd have to install it on an individual site, an individual IP.
8 hours later I'm looking toward the hacking community for advice.
The answer seems to be complex, work intensive and not common knowledge. I've found most answers and non-answers ambiguous.
My question to the WPMUDEV community is - Has anyone been able to install an SSL certificate on a mapped domain within a WordPress Multisite installation? If you've accomplished this, how did you do it?