Automap will work with X2 (I use a Novation Impulse 49), but currently Automap does not autodetect X2 like it does X1.
I'm not in front of my DAW at the moment, but I believe the documentation on how to set up Sonar is included in a documentation folder inside the Automap program folder. It should guide you through the basics.
To get mine to really work with X2, I wound up creating some custom Automap templates that I load up as neeeded. Works great, and the couple of extra mouse clicks it takes to load a template really isn't that big of a deal!!
Give yourself some hands-on experimenting time to work with Automap. It actually works quite well, but like many things DAW (and computer!) related, some custom tweaking usually works MUCH better than just relying on "automatic" or "wizard" setups.
Randy