Trying to have both OptimizePress and MarketPress co-exist

I’m having some trouble getting MarketPress to play nicely on a site with the OptimizePress 2 theme.

To me it looks like MarketPress is not using the template_include or index_template filter tags when it displays second level pages such as product lists for a specific category.

This page works: http://www.glenviewproducts.com.au/shop/products/

This one does not: http://www.glenviewproducts.com.au/shop/products/category/weathervane-accessories/

A snippet from the OptimizePress code where they have a switch to make it compatible with WP e-commerce:

add_filter(‘template_include’, ‘op_template_include’:wink:;

/*

* External plugins (WP e-commerce) are skiping the ‘template_include’ hook

* and are instead loading theme “index.php” template which shows “Finish blog setup” screen

* Added a checkbox in Dashboard — Global settings — external plugin compatibility

* This works only if that checkbox is on! to deal with some issues

*/

$val = op_get_option(‘ ‘:wink:;

if (‘on’ === $val) {

add_filter(‘index_template’, ‘op_template_include’:wink:;

}

The page is not working because the op_template_include is not being loaded. What filter should I tie in to to get it to load on the product list page for a specific category?