Virtual Box 4.0.8 is need for Gnome 3 support !!!
without guest toolkit, the installation works on the fail_back mode And the turn on the 3D acceleration in “Setting | display” , install the guest toolkit, which depends on the kernel-devel yum install kernel-devel-220.127.116.11-26.rc1.fc15.i686
yum install gcc
Gnome Shell is auto Enabled after reboot, and resolution is auto adjusted too. auto mount the vb shared folder by adding one line in /etc/fstab
Make the system font bigger
turn off the system/terminal sound
Chinese support ibus-daemon and python-py
setup as system daemon : ibus