Astro, I did a search for the term ‘printing css pages’ because I do not have experience with this topic to give you any advice however there are many results to choose from to learn the different techniques. The following link offers some tips on achieving what your client needs. Advanced CSS Printing - Using CSS Page Breaks

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I have one customer that absolutely insists his web pages print perfectly. Why? Because he refuses to look at his pages on the screen — he tells his employees to print the website for him to look at. And since he looks at pages that way, he believes most of his customers do just this. Needless to say, I’ve learned quite a few tricks to making a website print properly. I’ve already shared methods for making your website content printer-friendly, as well as making your website structure printer-friendly. One important aspect of making your pages printer-friendly is by using CSS/XHTML page breaks.

The technique at this link will explain a 'print style sheet' which allows printing of the content only, and not the pictures or navigation which for some sites will work best so that visitors do not waste ink. You may find it useful for future clients or perhaps others reading this thread will find it useful.
Making web pages printable using CSS

Hope that helps!

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