* Become privileged
 su -
* Get the VirtualBox repo installed (you may need to install wget):
 wget http://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo && cp virtualbox.repo /etc/yum.repos.d/
* Install VirtualBox (along with a few other needed packages)!  If you’re having issues here, try installing “kernel-PAE-devel”
 yum install -y VirtualBox -3.2 dkms gcc /etc/init.d/vboxdrv setup
* Add yourself to the “vboxusers” group and fix the SELinux Permissions (just in case):
 usermod -G vboxusers -a <yourusername>
 chcon -t textrel_shlib_t /usr/lib/virtualbox/VirtualBox.so
* Run, and enjoy!
 VirtualBox
 
'''NOTE:''' See [http://www.derekhildreth.com/blog/how-to-install-virtualbox-3-on-fedora-12-tutorial/ how-to-install-virtualbox-3-on-fedora-12-tutorial] for more info.