Thanks for bringing this to my attention. Although the import process will probably change dramatically in VaultWiki 4, I'll try to devote some time to filling out the manual so that it's accurate for the next month or two.
Also what needs to be even added is dealing with page translations for multi-language wikis.
To try to answer some of your questions briefly:
- NuWiki should be already installed during Vaultwiki install, and should not be removed before hand.
- wiki forums that are linked to using WIKI BB-Code should all be under the same parent wiki forum. This parent forum should be set as the default namespace via the Namespace Manager.
- The forum for Templates should be set as the Template namespace. The forum for Headers should be set as the Header namespace.
- Nuwiki islands don't need any special consideration. They are imported as is.
- NuWiki should be disabled after the import is complete, if you don't feel comfortable completely uninstalling it. Disabling NuWiki before the import will make VaultWiki unable to read and import NuWiki's permissions.
- Yes, you can uninstall NuWiki once you are satisfied with the import. You can do this in the usual way via the Product Manager.
- One caveat with NuWiki is that uninstalling it doesn't remove any of its data from the database. You have to upload and run a separate script from the NuWiki package to do this. Many users may no longer have the uninstall script that was included with NuWiki, so we will have to write one to include with VaultWiki.