ksproxy.ax is included in dxnt.cab which is included in ~/.cache/winetricks/directx9/directx_feb2010_redist.exe You can extract it by hand by doing something like mkdir foo cd foo winetricks d3dx9_36 cabextract ~/.cache/winetricks/directx9/directx_feb2010_redist.exe cabextract dxnt.cab cp ksproxy.ax ~/.wine/drive_c/windows/sytem32 (or is it system?) If that works, I can add it to winetricks later.