Different themes on different pages- no real answer so far!

I posted in a resolved (but related) thread. Since it is resolved, I’m not sure anyone will look at it and respond, so here is a new thread:

I would like to have a different theme (which has different .php files) for my store. At the same time, I want every other page in my site to have a the Twenty Ten theme.

I am planning on styling my store to look like my Twenty Ten theme, but because a store has different mechanics in the .php files, I cannot use just one theme.

How can I implement the Twenty Ten theme for all of my pages, but have a store (eShop v5.0) as well? I understand that themes are different from templates– so I cannot just select the inactive eShop theme for my store and then select the active Twenty Ten theme for all of the other pages.

Can someone tell me how to implement this?
Thanks- I look forward to a response

http://www.tvstrategies.com/blog/#
using WP v3.0