Smf?
Well, it can probably be manually add through third party coding maybe then =3 And ok
Smf - 'Simple Machines Forum'. Basically it's the same forum system that bellylove used. Forumup system has very little features. You can't even create 'sub-boards' using forumup.
As for manually adding codes, the only files you have access to are the CSS files and adding html codes for logos etc.
As far as I know simple machines is highly customisable if you have access to it's files.
Credits, T&N.