The following link describes pretty much what I did to beat the level:http://www.commandconquer3.com/gdi_mission_9.htmlIt IS a tough mission though. You need to take one base at a time obviously, but always make sure to save your game frequently so you can reload if you botch something.
~My gamerpic is NOT a Panda. It is a thermonuclear device DISGUISED as a plush toy~