I have the exact same scenario where I want to have discounts across multiple categories (buy any grouping from categories A,B,C that adds up to at least 12 items, get them for $XX.00, but Category D is excluded from all discounts). I have read and re-read both the original blog post and all these informative forum posts, but not being very confident with code of this complexity, I was hoping to find a helpful soul who will lead me by the hand step by step through the process. Do I still need to change all my items to the bulk pricing within VM? And exactly what file and line numbers am I looking for to edit?
This seems like such a vital choice to have in any online store, it's hard to understand why it's not a part of VM's core...
By the way, I'm using J1.5, VM1.1.3
Thanks so much in advance!!