Is there an installation guide for version 6? Do you know if you can upgrade from version 4 to version 6?
If you log into the customer support area you will be able to download version 6. Within these files is a documentation folder which contains all of the upgrade, patch, and install documentation files.
There is a direct upgrade path from version 4.7 to version 6, but if you are using any version before 4.7 you will have to patch to 4.7 first.