smilies

how do you add different smilies other than the ones that are given to you on the right hand side. if you want to. or is it that you can't.

You can use smilies from other sites like these:
http://www.foolstown.com/en/sm_all.htm
http://www.bestsmileys.com/pageindex.htm
http://www.addis-welt.de/smilie/index.html

Just copy and paste the url with the IMG tags into your post.

Like this:
http://foolstown.com/sm/bis.gif