Zen Cart 1.5 Product details - Custom Dynamic Dropdown Attributes & Additional Rollover Images

On our website for martial arts equipment we have a lot of clothing and othe stuff with several attributes to sell. Often a product has 2 attributes. Size and Color. Stock by attribute mod is installed and works well, but we need customization! We want the drop down boxes only to show the sizes and colors, which really are on stoc right now. So combinations which are sold out, should hide in the boxes! Right now its like this: [login to view URL] But it should look at the end like this: [login to view URL] So some customization needs to be done. The "Amount" input field must also become a dropdown box, just like in the other page. And show the max stock available in the attribut combination selected before ( size and color ). So at the end there are 3 ddboxes. Size, color and amound. Also our additional images should replace the main picture when hover. Also just like in the other market... Hopefully someone can manage this :D greetings, alex