From: http://a-pdf.com/faq/how-to-change-the-sequential-order-of-pages-in-a-pdf-file.htm. If you also want to manage your PDF order, purchase A-PDF Page Master software and then install it to your computer, compatible with Windows 2000/XP/Vista/7.

2. Question:
I have some trouble of changing page order. I have created a
PDF document, but now I want to rearrange PDF pages order,
transferred page 10 to the second page. It will be best if I can
add a blank page after page 4. I have no idea with
programming. So can you tell me a simplest solution?

3. Answer:
A-PDF Page Master is the best PDF manage tool for you to add
blank page, reorder PDF pages/change sequential order,
combing and extracting PDF page. You have the full control after
purchase this software. All function of A-PDF Master can be
used easily and quickly. Only require few minutes to reorder the
PDF page, not need to spend time to order one page by one. If
you also want to manage your PDF order, purchase A-PDF Page
Master software and then install it to your computer,
compatible with Windows 2000/XP/Vista/7.

4. Launch A-PDF Page Master software, click “File->Open” to
open your PDF file;

5. Click on page 4, right click and then insert blank page;

6. Move to top menu, click button Assemble Pages, change the
order from: 1,2,3,4,5,6,7,8,9,10 , 11 to 1, 10, 3,4,5,6,7,8,9, 2,
11;
After setting, save the new designed PDF document to your computer.

7. More see: www.a-pdf.com