New vBulletin page: Reusing extant CSS styles

[MediaHound]

How does one add CSS rules / files to a new vBulletin page? I see that vBulletin dynamically creates the CSS files for pages but I see no documentation on how to utilize this feature for a new page.

For instance, I see that the input fields on a specific vBulletin page have the class "someClass". Obviously one of the 12 CSS files included on the page have the definitions for "someClass". These CSS files are dynamically generated. I am writing a new vBulletin page using the technique described here and I would like the input fields on that page to also use the "someClass" class and definitions. I _could_ sniff the page, get the CSS, and copy it to a new file to include. However, I would prefer to use the real vBulletin facility as it looks like a feature that I will use often.

Thanks.