click here Is this the site you mean? If so I can't get into the forum settings as I'm not a member, but looking at the little smiley faces, then I think they will be available for you to use when you click on the "reply" button to a thread.
Some sites will let you use only the one's they supply, others will let you use your own. If this site allows you to use your own, then do a search on google click here withe the words "free smileys" or "free GIFS" download the ones you want to your PC and save them in a folder for future use.
The sites you visit will tell you if you can use them and how to up-load them to the site. each as a slightly different way of doing things.
Good luck. j.