pdf question

Hello... I have created a routine which outputs a pdf file of 'data only'. It is to be printed onto a pdf form which I obtain elsewhere. At present we are printing the blank form. Then placing it into the paper tray in order to print the data file to it. I would like to cause the data and form to both be printed on a single sheet, in one operation. That is; is it possible to cause the two files to be accessed in sequence, so that there is not a paper feed between them? For one to overlay the other? Many thanks Floyd --