Automatically save .pdf in sets, naming each file from a database

1. PDF contains multiple pages organised into two page sets, of approximately 2 to 100 sets. 2. Script to save out each two page set; i.e. (pages 1 & 2), (pages 3 & 4), (pages 5 & 6) until end of PDF file is reached. 3. Script to save out each set into folder according to a excel file in sequence. 4. PDF is file called '[login to view URL]' 5. Excel is called '[login to view URL]', data contained in worksheet "pdf export", column A "text" (example "1NORTH_2014_April_") 6. Excel will contain exact number of sets required. 7. Prefer VBA script running from Excel, but I am open to other solutions. 8. Cells in worksheet "pdf export", column A, may contain duplicate entries, therefore duplicate entries should automatically have a number added after them, i,e "("1NORTH_2014_April_", "1NORTH_2014_April_1", "1NORTH_2014_April_2, etc) BONUS : Extra $$ will be paid if prior to applying number to duplicate, a folder is searched looking for the last number in the sequence first, before next number in sequence is applied. i.e. if search folder contains "1NORTH_2014_April_5", the next file will be saved automatically as "1NORTH_2014_April_6" and so on. Please find attached test files for you to work on.