FULMAR2 Thanks for your review. The answer to your question - "why would you pay for this feature..." is because this functionality does not come with 10.4 tiger. If you want to combine PDF files in tiger, you need to download some 3rd Party PDF combining software. There are limited trial versions like PDF lab and PDF combine, but once the trial period expires, you must pay $30. So, your alternatives are upgrade to Leopard, or try any one of these free trials (including PDF Merge, which is less expensive than any of the aforementioned options).
(Version 2.3)