If you were able to convert it into a Word doc, and the cover page shows as a picture element, you might be able to edit that one page.Use the Format tab to 'recolor' the image into black and white. Let me know how it goes or if you want, sent me the Word doc and I can try it for you.
_________________________
I hear and I forget. I see and I remember. I do and I understand.--Confucius