switchdesk -- Changing Desktop Environment in Linux

Changing Desktop Environment in Linux:
using switchdesk:
Step1: Login as "root" user.
Step2: use the command "switchdesk KDE" to change in KDE mode.
OR use the command "switchdesk GNOME" to change in GNOME mode.
If switchdesk command fails??
Install switchdesk rpm from CD/DVD. OR use the command "yum install switchdesk" to install it from internet.
Thats All.

Fail to start Linux/Fedora in GUI mode .....

Fail to start Linux/Fedora in GUI mode
Step 1: Start your computer in runlevel one (1).
Step 2: change the line
id:5:initdefault:
as
id:3:initdefault:

in /etc/inittab file, so that the system can start in text mode and reboot the system using "reboot" command.
step 3:
Open the file "/etc/X11/xorg.conf " in a text editor (vi).
Change the color Depth to 15 in each "Display" SubSection.
Save the file.
Now use the command "startx" & enjiy.