You'll be fine. Friday will probably be quieter so I'd try to do a few of the rides then. Use EMH, particularly to ride Buzz, Peter Pan and Dumbo if they're all open then get to the Studios for opening to do Crush/Ratatouille.
Personally I'd go to the studios at opening (10am) on both days, one day concentrate on Crush and Ratatouille and then the other go to Toy Story Playland as these get large queues. Make sure you see the Mickey and the Magician show too and get there early as it's really popular.
I've found the queues tend to drop later in the day (between the parade and dreams) so that would be a good time to do Pirates, Phantom etc. Because of that I'd take a break during the day too so you're not too knackered later on.
It'll be busy but manageable, have a great time!