3. Integration of mirrored templates into the game.

The mirror has long been integrated into the game – there is no need to unpack anything, etc. Just check the box in the template list in the chat, and you're good to go.

7. I don't know about the Inferno patch; does it need to be installed by adding DLLs and text files, or is it already present in the game?

It depends on what you mean by the Inferno patch. At one time, the Inferno patch included changes such as Fiona starting with a specific tactic and Ignatus having defense instead of resistance. This is no longer the case. What remains of the Inferno patch: native land in the dungeon and splash mage does not affect Inferno troops.

These changes are already integrated into the game and do not require checking the box for the Inferno patch in the VT options.