Introduce yourself Forum?

[RateU]

Generally, you can do that like this:

1. Edit your Introduction Forum, you'll find Template Prefix setting there. Set the Template Prefix to intro_
2. Create new thread in your Global Templates, name it as intro_postbit_first template for horizontal postbit, and intro_postbit_first_classic template for classic postbit layout.
3. Copy paste your postbit codes to the intro_postbit_first template, and your postbit_classic codes to the intro_postbit_first_classic template.
4. Now, you can modify the intro_postbit_first and intro_postbit_first_classic templates as you want (background, new class css, layout and etc).
   

You can view this example application as your reference:
http://mybbhacks.zingaburga.com/showthread.php?tid=289