[amykhar]

The tab thing becomes easy as well. If you create appropriate categories for your subset, each tab would link to the forumdisplay for that specific category. You don't have to use forum home at all. You could design your own page for the index.php

So, macintosh stuff would be one category. - one forumdisplay
pc would be another category - another forum display
off topic would be a third - you get the idea.

Then, you set your admincp so that forumhome isn't index.php.

Then, you create an index.php that suits your tab design.

Conditionals will let you style things as you like them. - different colors or different banner ads for different forums, etc.