Marketpress multisite using multiple themes

am in the process of developing a multisite network with a market place and community features. I have enabled multisite and enabled buddy press, however the theme am using for my main network page isn't suitable for a market place or rather wouldn't look nice to display the products. So my question:- is it possible to set up the market place using marketpress plugin in a sub site of the network so that I can use a different theme and still be able to show all the products from across the entire network in the subsite (and not on my main page), and at the same time be able to show that latest products added to the marketplace on my main network, just as its done on your demo theme of the market frame.
If this is possible can someone tell me how its done please.

thank you