Special version compatible with SA-MP mod. For single-player use original version. Read description for some details.
Original version (2012)
You may use 7-Zip for extracting archive.
Carefully check game folder on last step of installation!
You can download the fix («Fix for The Seasons mods in variants for SA-MP») (was released 29 March 2014): fixed bug (in single-player), connected with crash of the game near lighthouse on Santa Maria beach (and, maybe, in few other places) and some other little things. If you are satisfied with the modification work — you can not install fix! Fix will be included in updated version of the mod.