gulikoza's program to allow Wing Commander 4 DVD to run without the dxr hardware addon board has been updated. Parts of the patch have been completely rewritten with DirectShow fixes, support for specific system configurations and different compatibility levels. You can grab the 43 k pack here. Unzip the files to your WC4 DVD installation directory and run the configuration link if necessary. Don't forget to turn on Windows 98 compatibility mode in the Properties tab of the WC4 executable. If you have Windows 2000 or encounter other problems, additional optional patches may be necessary from gulikoza's website.
I'm really excited about the new dxmci version, I almost rewrote the whole thing. There's a new configuration dialog that allows you to set how DShow is treated in case you have problems. There are 5 levels - lower level means there will be a shorter delay when loading videos (but that of course will depend on your computer speed). The configuration is stored inside the dll itself, so there's no ini files or messing with the registry therefore no uninstall required. Configuration dialog can be found by clicking on the link file also in the archive or alternatively you can type 'rundll32 dxmci.dll,configuration' to get to it.