Yes you can add it to the list. I looked it up on Whitelabs website and entered the values for it into BS for you. All you have to do is import this file into BS. Also when it comes to viability the best by date on white labs vials is 4 months from when it was made. So if it says best by Nov 1st 2012 than it was manufactured on July 1st 2012. Enter this into your recipe and it will tell you how much viability you have. Goodluck.
http://www.whitelabs.com/beer/homebrew_strains.html
for future reference