mutiple products on one page?

Howdy, Im considering upgrading from oscomerce to zencart. I really need the sales and coupon support.

However, before I switch I want to know if there is a way to keep my product page display. Basically without going into too much detail I sell some products as small medium large and jumbo. Each of these are on one page with a product image and description at the top and four lines at the bottom. Each line lists the size, another attribute dropdown box with style, cost, and a text box for quanity wanted. Then below these four lines is a 'add to cart' button.

I know I could simply list those 4 lines as an attribute by itself, however many of my customers do stuff like buying 1 small 5 large and 1 jumbo. I would rather not force them to to click 'add to cart' over and over and over again each time they want a new size.

Currently in oscomerce Im using the MasterProducts attribute to accomplish this goal. Is there anything similar I could use in zencart that would archive the same general setup?

Thanks in advance,
Jack

Just an update ..... I found a thread that talked about exactly what I need.

http://www.zen-cart.com/forum/showthread.php?t=35066

Im not sure I like editing core files, but I don't know the code well enough to make this into a module. However, this will at least get what I need.