Sort Filter Improvements - Zen Cart

We sell wedding flowers and the built in sort filter on Zen Cart is not really suited. We like the "Old to New" and "New to Old" and we like the "High to Low" and "Low to High" but the others are useless. We'd like one tha sorts by model that's called "Style Range" or something like that. Remove the one that's called "Most Popular". Also, there is a slight problem with the filter that needs to be fixed. When you're on the site and you search something in the search field. Try searching for ’wand’ for example. It brings up the search results. Now, when you use the filter drop down and choose an option like ‘low to high’ or any of the other filter options it takes you to the advanced search page (as if there are no results). We need that fixed too.