It used to be easy to do. It's not as easy now. If you can generate a link to the template...
(Something that looks like this: https://www.warlight.net/SinglePlayer?TemplateID=751078
...then you can just copy and paste the link, and change the word "Single" to the word "Multi". That does the trick.
I'm no longer sure how to generate that link, however.
Edited 3/16/2016 03:13:32