Meta tags for pages under Store

Hi,
I installed Marketpress for Wordpress, but how do I manage the meta tags for the pages under 'Store', e.g. Products, Shopping Cart, etc?

Currently I am using a WP plugin called SEO Ultimate. This plugin rely on the page being 'visible' under Pages, and add content there for title, description, etc.

If there is a hack for this, please let me know or direct me to the right place / plugin to use.

Thanks
Ed