Here in Dallas its self install. You can just go to the local office and get your cards and tuning adapters, come home and set them up, and then call the cable card hotline at 1-866-606-5889 to pair them up.
The CableCARD Technical Support Desk hours are:
Monday – Friday 8:00 am to 11:00 pm (Eastern)
Saturday – Sunday 10:00 am to 11:00 pm (Eastern)