You can find answers to the most frequently asked questions about downloading and viewing offline Help content for CS6 in this blog post:
http://blogs.adobe.com/mallika/2012/07/five-faqs-about-offline-help-fo r-creative-suite-6.html
Do let us know if you have any other questions that we can help address.
Thanks,
Mallika Yelandur
Adobe Community Help & Learning
North America
Europe, Middle East and Africa
Asia Pacific