These mods have all been built from the latest factory firmware version T889UVALK8.
MultiWindow Control * updated MWControl.apk *
4 way Reboot Options
Reboot into TWRP/CWM recovery
Make a nandroid backup in recovery
Flash zip file
MultiWindow Control V2
This is really cool and LegendK95 deserves all the credit. His app allows you to use almost any app in MultiWindow and add/remove the Samsung apps. I just smali hacked the framework for it to work on this version. Check his thread out here for all the details and his donation information.