I have been asked in the past could I merge one PDF with another. Without Distiller [or whatever it is called now] I did not find an easy way to do it. Although I have not evaluated this site yet it seems like the answer. From the site:
"MergePDF.net is a cool option to merge multiple PDF files without installing any software on the computer."
"There is no need for registeration or sign-up, just select PDF files from your computer and hit the Merge PDF button. It does have few limitation which wont affect majority of users. You can upload maximum of 10 files with individual file size limit is 5 MB. Also, more files you upload more time it will take to merge."
There is also a free offline alternative.
Online Merge PDF: Link
[The site suggests a donation for use, as the service is free of charge]
Offline PDF split and Merge: Link