Janis,
on the first page you will see a list of smiley categories, click on any of these they will show several smileys in that category, have a look at all the sections if needed until you find the one you like then click on that one and a page will come up with a list of codes, for the forum you highlight that code (
make sure all the code is blue) then copy (Control key and c), return to the forum post and have the flashing space indicator where you want the smiley to go to then post (Control key and v). If you are still flummoxed send me a pm and I will try to explain better
lol Mick