How to scan multiple pages to one pdf file?

I don't think you can do it with the scanner software. Here's a work around. Scan the pages and save them in a format you can paste into one of your word processor documents. Download PrimoPDF and install it. It makes Windows think it's a printer, so you can create pdfs from any application on your machine. Just open the file in it's default app, and chose the File> Print option. When the printer page comes up, PrimoPDF will be one of the choices in the choose printer drop down menu. Click it and click print. Your app will look like it does when it's printing. After it finishes, a PrimoPDF window will appear with options for PDF resolution, file name and destination. Name it, pick where you want to save it and click Create PDF. I maintain a web page for my local church, and use it to put WordPerfect, MS Word and MS Publisher files into a web viewable format. It's really pretty cool how it fools windows into thinking its a printer. Download PrimoPDF here: http://www.primopdf.com/ It's free.