help noob?
 

How do I post a header, and how do you change the colors of the admins and mods names?

Can you tell me a bit more in details as to what you mean by posting a header?

Whereas about your second question, go to your Acp-Usergroups-Usergroup Manager-{choose your custom group}-Edit and then where it says: Username HTML Markup enter your color value that you want that particular usergroup to have.

For ex, at the first are enter:

and at the second area, add the closing tag:

And change the color value accordingly. At the example above I entered the color I use for the admin group at my own forum.
Hope it helps.