Is there a code to remove/hide the 'View more Emoticons' menu entirely? I would like to add a second smiley category that is not accessible.

Hello,

Try adding this rule in your CSS:
Admin Panel > Display > Pics and colors > Colors > CSS Stylesheet:

Code:

form#smilies_categ select{display:none;}

Thanks! Is it also possible to align the smilies in the center, rather than aligning them to the left? I mean in the menu next to the editor.

Bumping this topic. Thanks so far, but I'd like to align the smilies to the center in the menu next to the editor.

I believe the previous post is spam, by the way...

I am not entirely sure you can move the smilies/emoticons to the center. If it was/is possible to do so by script it sounds like it would need to be a very complex one. In any case I personally have never seen this done before on any fm forum.