[Tim Wheatley]

No because the first post hack this is just edits what's shown on my screenshot, and then only on the first post. But what you want to do can be done (VERY EASILY).

Create another set of templates, edit the showthread and postbit templates, then under 'Forums & Moderators' click modify, then edit the forum you want to use those templates, and simply under 'Style Options' select the style you want it to use then 'yes' to 'Override users custom styles'...

There ya go.

I'm sure someone with a bigger talkin tongue can type this out for more of an explanation.