very small and simple maybe? vBulletin template question

[JGM007]

Hello,
I am currently working on a page with short windows tips for users on my message board who often get infected or let people into their computer when they really didnt mean to

any how to the point of the question:

I have the page at http://board.madoshi.com/comhelp.php

It does not look very well under a few of the styles, what would I need to edit in the template for the page to force it to use a custom style and over ride the user's default? Or is this done elsewhere than in the template? and how would I accomplish this task?

Thank you!

-JGM