1. I've just noticed that Doomsday won't detect the DHMP addon packages, if they are NOT located in a subfolder with the folder name ending with '.pack'. Is that on purpose?
2. Furthermore, Doomsday cannot handle packages correctly, that are placed in folders where the folder name begins with an underscore '_'. Packages located in a folder named '_.pack' or '_<some characters>.pack' do appear in the MOD management dialog and can be added to the load list, but the detail view (right-click) remains completely empty, loading a game fails, notifying the user to fix the seleted addon, which in this situation is impossible. Snowberry (.pk3) addons placed in a folder named '_.pack' or '_<some characters>.pack' are not detected at all.
3. Also, Doomsday does not detect Doomsday 2 packages placed in folders named just '.pack'. However Doomsday detects and correctly handles Snowberry (.pk3) addons located in a folder named '.pack'. I find that inconsistent.
If these are restrictions that cannot be removed, they should be mentioned in the manual.