Based on what's in my menus, the syntax should be something like: Code: env WINEPREFIX="/home/arkadiusz/.wine" wine "C:\Program Files\Steam\Steam.exe" Also, some Windows apps can be very fussy about what directory they're started from, and I think that's the reason for the error message. In KDE, the menu editor has a field called "work path"; entering the full path to the directory where the executable is located solved a similar problem with a different app for me.
