Open4 - printing checks to a .txt file

I need to capability to print checks and W-2's to a .txt file.
Currently, all gets created as a .prn file. I want to use blank stock
on a printer with a MICR cartridge, and eliminate pre-printed forms.
Has anyone had experience with this? Or, is this a modification that
Open4 would have to perform?

Appreciate any insight!

Greg Cavanaugh
Hines Corporation