Apply these registry settings in your Wine instance. Verify them, as you may need to set these manually within the regedit of wine.
Start the game with "wine FLASHPOINTBETA.EXE -nosplash [-mod=@YourMod] .."
Once the game started, start a wine task manager with: "wine taskmgr" and set the CPU affinity for the flashpoint process to a single CPU. Other wise there will be massive lag in multiplayer after a few minutes.