Maybe its my extensive list of mods that i already use: http://pastebin.com/raw/9td7yNTp (although if there was a comparability error i should get an error when i start factorio or when i load a save game right? i get neither of those) But so far i have not found a way to enter new factory buildings, old factory buildings, or found any completely new factory building which gave me the ability to enter.

Could you make that part a little but more clear? is there a special key i need to press, or do i need to research something special in order for this mod to work?

Never mind, found it. Its an tech you need to research called architecture. Since it has the same icon on the research page as automated construction for blueprints i overlooked it :P