Alberta,
go to the technical board and there is a thread called "get your countdowns here" and in there you will find the link. It's pretty easy. Just did mine last week.
Just an fyi if you have trouble with step 8 like I did with getting the info you need to copy and paste where/when it should. I just had to use Ctrl+V to get the info to paste into my signature. Then when it finally did the countdown showed up 3 times! I just deleted all the info in my signature and did it over that way again. When your done do a test in technical to see if it came out ok.
Good luck!