How to scan documents

I have a Brother scanner that has a document feed on it. It scans a multipage doc and puts the output into a PDF file on my server via FTP.

1. Scan the odd pages, front to back.
2. Scan the even pages, back to fron.
3. Convert the PDF documents to PS documents
4. Split the PS documents into separate files, one page per file
5. Optionally perform any additional processing on the individual pages, such as image compression
6. For WEB version
   1. Perform OCR on the individual page files so they can be searched separately
   2. Convert individual pages into PNG files for viewing
   3. Put all pages into a book viewer collection
7. Merge the page files into one PS document
8. Convert the merged document back into PDF document
9. Perform OCR on the PDF doc