The script is working fine. This is a known issue with the four-turns-per-year script - when you do as you say, the RTW engine brings up the winter graphics for that first turn that you load, but the script should prevent movement from being affected. The only place you should see actual snow effects which could change gameplay is on the battlefield for that one turn.
After you hit "end turn" things should self-correct back to normal.
Bookmarks