If you have Adobe Acrobat (Standard or Pro), you can just select those pages in the "Pages" pane, right-click and select to extract those pages into a new document. This will create a new PDF document that is open in Acrobat, all you have to do at this point is to save the document, and you have a new PDF file.
Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com