Actually, that cockpit download site seems to be Neuro's (the man behind the Fusion pack and Fusionizers for UP/HSFX) and Neuro likely added the Hurricane cockpit to IK-3 himself. You can check his forum with this IK-3 flyable mod posted there
http://www.thefoxbats.ch/forums/viewforum.php?f=11The IK-3 flyable mod works fine in my DBW, but one warning though: That IK-3 classfile loads FM from buttons instead of the separate FM file in this Epervier's IK-3 cutout mod. Luckily, SAS buttons includes some IK-3 FM with the right name, but that flight model is not the same as in v4.11m. So, the flight behaviour and performance may be different than without the flyable mod, but I haven't actually tested the FM in SAS buttons since I'm using a custom buttons I've built with original v4.11m FMs in my DBW.
The other mods at Neuro's download server may be old versions (least Ki-45 and Hs-123 were when I checked), so I'd suggest using them only if SAS versions don't exist.