Using Marketpress GridMarket within another Theme


I want to utilise gridmarket to display my products and services but dont neccessarily want it to take over the theme of my site as well.

What recommendations can anyone give for managing this?

thanks, Paul

P.S. I’m setting up a network of sites that sell different products for my company (but from separate sites) I’m toying with the idea of a centralised store concept with the ability to display specific products on the respective site. Any ideas on managing this would also be appreciated. i.e. run a centralised store and wrap the product pages into the respective sites..

thanks in advance