also, to install it on a seperate partition, would you just make another partition and then have the option to install it on that partition when you install osx?
one more thing, when you install, and then reboot, it MIGHT then go into a light blue screen FOREVER. to fix this, just switch to your radeon, boot up, make your user, reboot and change it back to your integrated and it will work fine afterwards. any other problems you encounter, please contact me via blackdogs377@hotmail.com or private message