Anyone use Blogger? Template customization question.

I’m helping someone out who wants to implement a template customization in Blogger.

The hack is detailed in this help page - namely, in the template, replace


<Blogger> all the content </Blogger> 

with:


 <MainPage> <Blogger>...</Blogger> </MainPage>
<ItemPage> <Blogger>...</Blogger> </ItemPage> 

Problem is that in all the templates I’ve looked at, the ItemPage tags are inside the Blogger tags already. If I implement it as listed, it just seems to mess everything all up.

Has anyone successfully implemented this customization? If so, did you have to tweak it? When the help file mentions the ‘archive page’, what does it mean - does it mean the archive tags within the main template?

Any help much appreciated.