CAN I PUT A SIGNATURE FOR MY BLACKBERRY CURVE 8520 TEXTS?

I HAVE A BLACKBERRY CURVE 8520 PHONE. I WANTED TO PUT A SIGNATURE FOR MY TEXT MESSAGES. BUT I HAVE LOOKED THROUGH MY SETTINGS IN MY PHONE AND CANT FIND IT. I HAVE ALOT OF SETTINGS. CAN ANYONE HELP? IF YOU KNOW PLEASE GUIDE ME STEP BY STEP ON HOW TO DO IT. THANKS :)

Options icon - Auto Text

Press the Menu key and select New

Replace:
xox

With:
What you want your sig to say

Press the Menu key and select Save

At the end of a text type xox and your sig will appear.

I used xox as an example. You can type whatever you want under Replace:

Keep in mind that your sig will count in the 160 maximum characters so don't make it too long