Hi! There are a couple of ways to get the signature trackers. The first is to click on someone else's. That should take you to a page where you can configure your own.
The next way to get there is to follow this
link to the 3FC tracker.
The third is to choose "Quick Links" from the purple bar near the top of the page. Signature Weight Tracker is the second of the middle options.
Once you've configured a tracker, copy the code you're given and choose "User CP" from the purple bar near the top of the page. From there, choose "Edit Signature." You should see a field to paste your code into, you have options to save or preview (I alway preview my sig like mad, but I'm slightly neurotic). Once you're happy with the signature, hit save and you should be good to go.
Hope that helps! (And I know what you mean about dragging. I was super tired the first time I did South Beach. I think we weren't getting enough veggies - we loaded up on them this time and I've been fine from an energy standpoint.)