[8FS_Bulau]

I've got the 4.08 1946 ofcourse
DO i really need UI or the other?

Well, if you want to use a mod, like the Uranium Edition, then you need some kind of Mod Activator.
If you are bandwidth limited, then a simple Mod Activator on this site, which works with 4.08 would be the Primary Mod Activator v5.2:
(The link is inoperative)

If you are up for downloading the Official Patch v4.09m, then you could use the SAS Mod Activator:
http://www.sas1946.com/

Beyond that, you are into a Mod Pack, with the attendant huge downloads required.