There is a way to install a game that requires steam from a retail disc
1. launch steam
2. quit steam
3. Windows Key+R (or go to start > run) and type in "C:\program files\steam\steam.exe -install X:" without the " " and where X: is the drive with your game disc in.
It should start installing from DVD.
tis all well documented here: https://support.steampowered.com/kb_...5357-FSQM-0382