(or simply accept that the resolution is not ok, but he wants to continue anyway)
If client however does not have a design, he should be able to create a design on the correct template. with the possibility to add photo's, add text, add symbols (arrows etc.), manipulate photo's (i.e., crop, mirror, color correct, ... ).
... In the end, the output of the program should allways be a ready to print PDF in our correct template. That way we can easily put it to print!