Web Class and the use of Frames

[IQ]

I have an initial template which has a frameset with three frames in it (Banner, Contents and Main). I have attached three templates to this via the designer (Right click on the frame tag and attach a web item). This works OK.

I then wish to change the initial frameset with a different frameset with additional frames in it.

The question is:- How do you change the base frame page to another page from within the webclass?

If you set NextItem and then use WriteTemplate, how can you control which frame the template is written to?

Any ideas would be gratefully received.

Thanks

IQ