Zen Cart Modification

In zencart: **Show 2 price + savings.** Retail Price: Our Price: You save: 0.00! (10% off!) Current price in catalog is retail price. Need to add another field in admin our price, which will be used when someone add the item to cart. I also need a way to bulk control our price based on retail price. You could use quick update as a base code which is a contribution that already does that with the standard zencart item price. **Categories.** The way categories work right now in Zencart is terrible for my latest project. Basicly right now I have Anime DVDs ----ABC ----DEF I can’t make folder in the ABC and DEF category. I’d like to be able to do so and so I could make 1 category per anime. Also when someone would click ABC, it would now show all the subcategory in that subcategory on the left menu. I also need a better way to manage those new subcategory and the products that are in it. I can’t seem to think of a good way to do it, maybe you can? Maybe I could use easypopulate but that wouldn’t be perfect. Of course if you know any contribution that would allow you to save time please use them.