Help with modding how usernames display.

[TomParad0x]

Basically, we run a radio station website ( http://haxradio.com ). We want to make it so our users that are listening to the show have an icon of some kind next to their name. We know how to mod the shoutcast to update a database for it, but i cant find where VB determines how a username looks.

Can some one direct me to the file / function / veriable (s) that controls how usernames look?

Also, i cant figure out what actually executes an MySQL query in the files, IE: I want to get a field "listening" in a table somewhere, how would i go about doing this?

Lastly, if i am modding this in the plugin management thing, what hook do i use?

I know PHP to actually *write* the plugin, but i am new to the vBulletin code layout.

Thanks, TomParad0x.