add multiple items in one form... one click

Hi, all:

I need to add several unique items at one time and with different quantities as needed like this per example...

2 - excedrin
4 - tylenol
2 - bayer
3 - nyquil

I was reading that one can use the "multiple_products_cart_quantity" form structure, so I set this code up, that has 2 product id's, but it's not working right, only added the last item. What am I doing wrong?? appreciate the help!

Thanks!

<input type="text" name="cart_quantity" value="1" maxlength="6" size="4" /><br /><br /><input type="hidden" name="products_id" value="1" />
<input type="text" name="cart_quantity" value="1" maxlength="6" size="4" /><br /><br /><input type="hidden" name="products_id" value="2" />
<input type="image" src="includes/templates/template_default/buttons/english/button_in_cart.gif" alt="Add to Cart" title=" Add to Cart " />

Are you sure that is understandable for customers? When you have to add all those ingredients, it looks like one product for me. When you sell soft drinks, you wouldnt want to order all the ingredients at the right quantity seperate isnt it?

No, it's all different, unrelated products... I wand people to be able to choose different quantities of different products at once, and then submit the form, in one click...

I read that it could be done by using the "multiple_products_cart_quantity" form type, but havent been able to do it...