In order to register you must have purchased Dual Drive or Tropical Heat and received a serial number.
The serial number looks something like "00018-7G4D9ABD0D1J”. The serial number can register the game up to three times.
Open the program and, when prompted, click “Register”. Follow the on-screen registration steps.
If you do not have an internet connection on the computer you are registering, you need to stop during registration once you have your “computer code” (leave the registration window open). Write this computer code down, then on a computer that has an internet connection get your unlock code manually by going to http://www.somaticvision.com/registration/ and entering the computer code you wrote down.