Try the DirectDraw_Compatibility_Tool:
http://www.4shared.com/file/xeIljXSm...ity_Tool_.html
Just run the program and browse to your WinSPMBT.exe or WinSPWW2.exe and hit Apply. Then start the game directly from WinSPMBT.EXE or WinSPWW2.exe. do not use the game options to start the game or you will loose your explorer.
The advantage of this other fix is that it does not close explorer. You can Alt tab to your desktop to use email etc. and go back to game.
I posted more info about it here:
http://forum.shrapnelgames.com/showthread.php?t=47156