I understand that you say I have my documents organised the wrong way. But I guess it's the nature of the document. To be a bit more specific: the main document (the static one) is actually altered in a first step with some kind of templating engine. It holds all the customer info. The customer can have multiple ware houses. So to the general info should be a list appended with all the warehouse's info.

I think I will go the direction with macros, since I can use a document macro that is executed on opening the main document to open the warehouse mail merge document, sets up the data sourcde and startes the mail merging. I will update this post when I have a working solution.ö

Thanks anyway!