Michael,
Here are 2 solutions for you.
Firstly, if you just want to provide your customer with an electronic copy of your design, you can give them a copy of our free Stardraw Viewer. This will open up any Stardraw drawing, allow you to zoom into any part and print it out on any printer. You can download and freely redistribute the Stardraw Viewer here:
http://www.stardraw.com/products/OrderViewer.asp
Alternatively, if you really needed to generate a PDF, then you can purchase the full Adobe Acrobat Package from www.adobe.com. This will install a PDF Printer on your system and you can generate a PDF from any Windows application that can print, including Stardraw.