X Windows not working

Sorry for the description, basically I installed linux RHEL 6.3 added the Xwindows and legacy X windows components then I modified the /etc/inittab file id:5:initdefault as indicated by the installation guide, however when I reboot it hangs up. Not sure if this helps but the progress bar instead of being white, red and lighter red, turns white, blue and orange I am not sure if this means anything.

I am running RHEL in a laptop Intel Core 2 Duo, 64 bit, 8GB RAM and 120 GB disc.

Your help is appreciated