CorelDraw X5, Epson Pro 4880 Printer Settings for Screen Print

Hi Guys,

I'm trying to print pure black onto film through coreldraw (instead of using rip software).  I've installed the Ghostscript plugin that came with CorelDraw but I don't know how to use it?
What settings do I need to play around to get a pure black print? I've ticked 'preserve pure black' in colour management. Which made a slight difference. Any tips or suggestions would be much appreciated. 

Thanks,
Zara