First of all.. you need to download the correct VirtualBox RPM for Fedora 13 64 bits…
VirtualBox RPM Fedora 13 64 bits
Ok… now… in console and as root:
yum -y install gcc glibc-devel kernel-devel
Now:
rpm -i VirtualBox-3.2-3.2.4_62467_fedora13-1.x86_64.rpm
Now:
/etc/init.d/vboxdrv setup
And that’s it… now you can run Virtual Box..