Prestashop: fix advance search module error

Hi i am using presetashop 1.6.1.6 version. I have also bought the advance search module filter. I made some slight layout changes to the module so that the filter options appear at the top of the page. I am however facing some issues with it and need some help to fix the errors. The errors are: 1) once the user selects a filter option from advance search, and in the results page, if the user refreshes the page, or clicks on back button, then either he gets server error and page does not load, or if the page loads, then the advance search menu is not shown 2) normally if no filter options are selected, then on mouse-over a any images in category page, the product images change. However, if the user selects a filter option, and in the results shown, if he does mouse-over the images do not change Finally we want to make some further changes to design layout of advance search filter. For example the menus should expand automatically on mouse-over and collapse if mouse is moved away, plus some small layout changes. I can give you a perfect example of how it should look and function. If you can do this work urgently then bid. it has to be done in 2 days.