Lots of companies are doing everything in house and following the advice of their attornies.
What blue print are YOU following?
Is there a step by step procedure you've found?
How are you cross referencing images, docs and urls?
I've seen a few different software based solutions offered. This one is using obvious scare tactics which I'm sure are working to a degree.
http://www.zofex.com/
I know AaronM mentioned he had something in the works to release. Any other companies offering document and information management services/software that you know of?