Could you detail what exactly you want to do?

Creating Area Template is not an easy process, but I could point  you in the right direction

Hello,

We want to be able to create  additional area  templates that users can select when creating subareas. For example, we want to modify the Contents Area template  - and set it as a standard for other subareas when created.

This is a pretty thought subject and unfortunately there is no visual way to do this.

1. You need to get familiar  with templates
msdn.microsoft.com/.../tsovIntroTemplates.asp

2. Topics template  are nothing else than WSS templates  that only applied to Topics

3. The template list for Topics are contained in the webtempsps.xml file located in \TEMPLATE\1033\XML

4. From this file, you can find the sub-dir name for the Content Area template -> SPSTOC

5. In the directory TEMPLATE\1033\SPSTOC, locate the file XML\onet.xml, this file contains the definition of the template and how it is provisionned. Making changes will involve making additional changes in this file and other files and directory

6. In order to create  a new template, you will need to clone an existing one and add it to the WEBTEMPSPS.XML

In addition, there is a new article on MSDN

msdn.microsoft.com/.../...zingSharePointSites2.asp