Until EA releases some pack for us.
This is annoying as hell - I can't extract the music, I can't extract the sounds, I can't extract the files needed to mod units, I can't extract anything!!
Banshee's editor is alright, I can look at some textures using it and all that, but if I extract the files, they're in some xml format... and I'm clueless when it comes to XML.
Isn't there some program to further extract the files that we extracted using Banshee's .big tool?
EA is really shooting themselves in the foot with this. Part of the reason Generals and ZH was so successful was because how easy it was to mod it... hundreds of user mods...