Need help customizing a page

[RobinatPJRC]

I'm looking for some help in figuring out how to customize a page for a specific forum. One of the forums on our vBulletin site is for posting technical support questions. We've posted a sticky giving instructions on how to post tech support questions (need screen shots of error messages, complete copy of code, etc) but people seem to forget that when they click on the Post New Thread button and start typing away. We're getting too many poor quality messages asking for help.

I would like to customize the post new thread page (the one with the dialog box where the users start typing their question) to include basic guidance and etiquette for asking tech support questions. It looks like I should be able to do this by using styles, but I'm not quite sure how to go about doing it. Is there anyone who can give me some guidance.

I apologize if I'm posting this on the wrong forum. If there is a better place for me to be asking my questions I will happily post there.