The xcc_mixer1.40.zip file you have requested: Utilities / XCC Mixer - 673.42kb is not available. Perhaps try browsing all files for the game C&C: Generals Zero Hour and upload any files you want to share or are missing. This is the only information we could locate:
A utility that allows you to create, edit, modify and view all sorts of C&C related files. It covers Tiberian Dawn through Zero Hour. You can view ALL files, no matter what game they're from. The readme file is old, so it doesn't say everything you need to know. If it tends to freeze while starting up, hold down the shift key while it's starting. That will work.