First of all, welcome to Cruise-Chat. Enjoy your stay!
To create a new countdown ticker for your cruise, visit: http://www.caribbeanmag.com/cd/vc/
When you're done you will get a "code".
This is what you're gonna type into the Signature -field in your profile.
Your signature will be placed in the end of all messages you are writing in these forums.
If you have more questions, please ask.