winSPMBT comes with a range of pre-made scenarios. There is also a scenario editor that enables players to create their own scenarios. Many of these player-designed scenarios can be downloaded from the Wargamer's Games Depot.
The game's battle generator (pictured here) can be used to generate random battles from most of the world's conflicts since 1945. I have compiled a list of historical and hypothetical random battle scenarios on my winSPMBT random battles page.
There is a forum for winSPMBT at Shrapnel Games. It can be used to discuss the game, find opponents and obtain technical support.