Sajjad,
A quick and rough glance at boot process and starting installation:
Place media into drive and boot the system. Stop autoboot process by pressing any key when prompted at screen.
At boot console prompt you can fire HELP command to list all commands available at that prompt.
Here you can use sea command to search bootable media. It will list DVD installation media too which you have inserted in drive with its path eg.p0,p1 or p2 like.
Then boot with BOOT P0 command. where P0 is your dvd media number.
After a few minutes, at the Interact with IPL? prompt press n.
After this machine will boot from DVD media and will take you to the installation prompt.
Where it begins with asking you with lang or so.
This is very vage description to make it sound simpler but before to go with installation suggest you to got through above mentioned guides.
Best Luck.
Will it remain a personal, if I broadcast it here!
