Wunderboy released version 1.6 of his SMD Exporter today (http://www.wunderboy.org/). Everyone who uses WWMT should thank him for some of the things he's done to help support the Source community. If you use his exporter and WWMT, you should go get this version as it is required for some of the new WWMT features (like using non-renderable meshes as bones, which you might need if you want to use CAT as your rig).
Please share with Wunderboy your appreciation by donating something to his Paypal Donate link on his site. If you can't maybe at least send him a thankful email.
PS. At the moment, it is only released for 3ds Max 9 thru 2011.