Integrating MarketPress to Templatic Theme

Hi WP Gurus,

"Robust Themeing Support" is a feature highlighted in the MarketPress page.

I'm currently using a e-commerce Templatic theme in one of my site. Templatic theme is using the e-commerce framework from http://ecommerceplex.com.

My question is ... how easy is it to replace or integrate the MarketPress into this Tempatic theme?

Would appreciate if there's any WP theme gurus here who can advise me on how to go about using MarketPress in 3rd-party premium theme like Templatic.

Thank you in advance.

Best Regards, William