Shopping List for Recipe Items

Hi All,

I have been desperately trying to create a function for a shopping list for a recipe site. I've used CCK, Views, had a look at the Recipe Module and the Wishlist module (which just doesn't work)!!! But I still can't figure out the best way to do it!

it basically needs to do the following:

Users can add a recipes ingredients to a shopping list (option to do 'add to shopping list' on recipe page) and the Shopping list will display the ingredients and quantities of that recipes ingredients on a shopping list node (each ingredient on separate line). If a user adds ingredients from another recipe, this will add the new ingredients to the shopping list as well. If an ingredient occurs twice (or more), this will be listed once but the quantity will increase. The user then has the option to amend quantities (for items they may already have) and print the shopping list.

Any advice would be much appreciated as I'm slowly going insane with this!!!

Cheers.

Warren.