As jmgalvin advised, in Acrobat Pro 6, Document Pages Extract, tell it the first and last page for the new document, and save it with a new filename. I do it all the time here. Also, if you want to make a file more compact without dividing it, save it as JPEG2000 files, and then Create a PDF from Multiple files, and select those JPEG 2000 files as your source, then save the result as PDF. If you were working with scanned text pages, you might only reduce the file size by half. If there are a lot of scanned drawings, you may reduce file size by up to 12 times! One interesting item I've discovered with Pro 6 - saving as JPEG 2000 doesn't work well if the images is very wide, like an engineering drawing 20" high by 6 or 7 feet wide. If the file has many of these, I just Rotate all the images 90 before saving as JPEG, and then rotate them all back after creating the new PDF from the JPEGs.
Also - if you save as just 'JPEG' instead of JPEG 2000, the images will lose their orientation in the new consolidated file, and you'll have to go through and tell each one which was is up. If you use JPEG2000 as your intermediate file format, you avoid that extra work.
Fred Wagner
Fred Wagner