Well, the combination is very easy to do yourself. I've tried and it works perfect so far.What I did was to read the documentation for Simple Season about how to add 'WinterWorld' for XP9. Just adopt the instructions to fit XP10.
The content of '1000_autumn' and '1000_Winter' goes in to corresponding folders in 'zzzzzz1000 world terrain'
'1000 autogen_RUS_Autmn' and '1000 autogen_Winter' are only for Russia while '1000 autogen_autmn' and '1000 autogen_World_Winter' is for the entire world (a little inconsistency in naming)
The rest is self-explanatory I guess.
An it looks quite well indeed, even though the winter doesn't look as deep as ShePooley's 'very deep snow' in my opinion (so far).
Simple Season is indeed a fabulous plugin!
The winter textures are a little bit heavy on the FPS though, dropped about 15 frames flying low over my local town (helicopter), 10 over surrounding forest, compared to autumn with everything else the same. Both causes heavy FPS drop when first entering the the town borders but stabilizing on a reasonable level after a few seconds.But never the less, an interesting project worth following!