changing marketpress display functions

Hi, I would like to change framemarket_mp_list_global_products() function so i can reorder the display and nesting of elements. Is this the function called with [mp_list_global_products]? How can i do that? I found the function in the framemarket/library/functions/marketpress.php, but it would probably be smart if i can play with it in gridmarket child theme. The problem is i don't know where to put my version of the function. I would also like to create a shortcode for it or possibly use the same one. Is this possible?
Thank you!