I have a Lexmark 4550 all-in-one. I often need to scan documents mostly multiple pages and save them as reasonably small sized PDF files. Is there a SW that can do this? For info: the SW that came with the Lexmark was not so good – it could scan only single pages and save, no good for me. The Lexmark printer is good. What SW must I download so I can save the files as PDF. At present I am using the MS Document Scanning. This is fine but I have to save as TIF &/or GIF files.Thanks