I still havent worked out the lilypie one but the one thats on mine is OK. All you do is click on it, another page should pop up and you fill in the details of your due date etc then copy the code that it gives you.
Once that is done you then go to "PROFILE" on huggies, then "edit profile" and then "Change Signature" and paste the code there and save changes.
Set it upon the lilypie website then click on the forum ticker PsuedoHMTL...copy and paste the formula to your huggies signature and bingo...there it is...good luck.