[Uzin]

xctract the map to temperary folder.
And after that you can manually add map to HSFX.
just drop the Kt_svir folder to \MODS\MapMods and
add these lines to MODS\MapMods\ all.ini file
Kt_svir Kt_svir/load.ini
Kt_svir_W Kt_svir/loadw.ini

Beg your pardon, kapteeni, but your map should be dropped into
.../Il2 Sturmovik 1946/Files/maps/ folder of HSFX4.1
where also the file all.ini resides.
The map itself is very nice, as it is your good practice.
Happy new year !