[CentOS] centos firewall?

>> How do I add 5900 to the centos firewall? How do I edit the conf  
>> file?

> You can get into a FW cfg screen (sort of gui - ncurses I beleive) by
> running:
>
> # setup

Hmm, after ssh'ing in, I run setup and nothing. a 'locate' turns up  
nothing either..

-Jason