Filename when printing to a file

First: TIFEXP is not what i am looking for.

I do not print regular to paper but into a file. I use a special "printer" driver to print to a tif-file. The tif-file is a black-and-white classic "blueprint". LT 2014 produces a filename that looks like this:

M__pk_dwg_39000_39200_39257-a1 Model (1).tif

I simply need the filename itself:

39257-a1.tif

How can i change this?