About the userbox, I can't remember but it was kinda a long time ago. I just basically copy/pasted it from elsewhere.
However, I googled how to make a Userbox and I came across this page. It should provide you the code needed to give your wiki a userbox. Just go into edit mode and copy all the code it has. However, that's powered by a CSS class code. So unless you have administration privileges to access sensitive coding, then you'll have to manually input the style parameters for each cells.
There's no concern of any Creative Common violation on the documentation, so I think you'll be okay using that.