Hi, Actually, i use "~/.wine" for my all applications. When i want to override a dll, it's simple, i use winecfg and i have this line on Regedit : Code: HKEY_CURRENT_USER\Software\Wine\AppDefaults\POWERPNT.EXE\DllOverrides I create a [DIRECT3D] key for Assassin's Creed Brotherhood, i create it like this : Code: HKEY_CURRENT_USER\Software\Wine\AppDefaults\AssassinsCreedBrotherhood.exe\Direct3D In this key, i create 2 values : UseGLSL=disabled and Multisampling=enabled But, i have a problem with these values. they're not used when i launch a game. For exemple in Assassin's Creed Brotherhood, if Multisampling is enabled in Regedit so I can activate it in game. Result : If if i enable Mutlisampling by Code: HKEY_CURRENT_USER\Software\Wine\AppDefaults\AssassinsCreedBrotherhood.exe\Direct3D I can't activate it in game. But i enable Multisampling by Code: HKEY_CURRENT_USER\Software\Wine\Direct3D , i can activate it in game... Why by my first way, it doesn't work? If i use the second, it's for all application and not one... Thanks for your help