Yee Haa, I finally figured out how to put the signature in!!! Anyway , will share this with you all... If you like a simple signature like mine, you can head over to http://www.mylivesignature.com/ . All you have to do is "register" and then click on "start now". There are a few choices for you to go explore, but I chose the simple "signature creation wizard". You can even scan your signature if you want a more authentic one...
Then you can choose which type of signature you would like.. which fonts, how large and so on... Go ahead and explore. Once done, just save the signature to your computer and / or copy the HTML code to put inside your blog.
Having done that, go to the 'design' page of your blog, and click on Settings... the on the Post and comments tab
Happy trying it out!!!!