Wow, I wish I'd seen this sooner. I've spent so much time reading 23 pages of piece-meal instructions on the Additional Products Fields contribution, only to find out that TheOracle is no longer around to help me make it work. His contribution still involves editing so many files that this seems just as good.

I would love to see step-by-step instructions like those from crazy_chris but using the new table, like the others have suggested.

Alternatively, is there a way to manually asign product id numbers? My main problem is that I want to show both the manufacturer's model number & my sku number. The dev team seems to suggest using the 'model' field for your sku, but I need both. Using my sku as the id would be ideal.

Thanks in advance for any suggestions!