Editing LINUX booting

Now I will study about how to edit Linux booting. Hopefully what me write this you can understand easily and good for you. Okay... now we justly start. Way of to be direct LINUX of booting to XWINDOW :

Step into directory of home ... / etc / Kb inittab(1.7)
its contents:
======================== start


# Default runlevel. The runlevels used by RHS are:
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6 - reboot (Do NOT set initdefault to this)
#
id:3:initdefault:
======================== Finish

later;then change.
id:3:initdefault:

becoming

id:5:initdefault:
or according to your choice