IT Project - Creation of Information Portal

I'd like to copy and rebrand a Health and Safety portal containing lots of documents in various formats.

I basically want to copy the data in a website and have a database like this branded for use in my own business.
Containing all of the same information
Enabling me to allocate user names and passwords
Whilst having a management control centre to upload, update and keep information current.
So the first job is copying content.