Template drop into the Project Navigator ?

A customer is asking to be able to print directly from the application some document mixing pre-existent data and data that comes from a data base file.

I’ve made a prototype, and it works fine. But, a interesting question arise: what if the customer want to change things in the original (pre-existent) data ?

A solution is to be able to drop a template file in the Navigator and use that to print the document. In the future, and to some extent, the customer have only have to change the contents of that original file and keep the free location to place the data from the data base.

But, as far as I tried, I was not able to drop a template file (text file / rtf file) .