How can I keep pdfCreator from adding additional "white space" or increasing the margins to my doucments?

When I create the PDF, pdfCreator adds space at the top (and bottom), which changes the appearance of the original material.

Is there an option that I have missed that will keep the original document size?

Also, if I create a PDF of a scanned document (say a utility bill), pdfCreator always make it a fixed paper size (say 8.5 x 11). If I use cutePDF or PrimoPDF they both create the PDF file the same size as the original - whatever the scanned size, that is the size of the PDF.

How do I get rid of this extra white space?

I far perfer pdfCreator but I want the document to retain the original size.

Am I missing something?