You can find lots of tutorials (50+) on the website of Erik Dubois @ http://erikdubois.be.
These articles are often accompanied with a youtube tutorial you can find on his channel.
Archlabs General Tutorials
These are all the tutorials created for and about Archlabs.
Archlabs – Virtual Box
Installing virtual box on archlabs is explained in this article. It explains what problems you encounter and how to solve them. Skip to the end conclusion to find out what is important to know.
Archlabs 4.0 Customization
What to do after installing Archlabs 4.0? How to customize Archlabs and give it your personal touch? Going over the most important parts that make Archlabs unique.
Erik Dubois is always ready to make new tutorials on topics of general interest.
Just let him know on Google+.