I would think that you would just have to include the XSL stylesheet
link in the top of the RSS file, but When i try to view my RSS feed in
FF 2 with the XSL, it doesn't work and just displays the FF default
for RSS feeds.
Add a comment before the <rss> or <feed> root tag that is at least 512
bytes long and your XSL stylesheet will get applied in lieu of the
default Firefox stylesheet. But make sure your stylesheet is really
what your users want, since overriding the default sheet means users
will see something different from what they usually see for feeds and
won't be able to subscribe to it in the same way they can subscribe
using the Firefox-provided UI.
-myk