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This is tip will help people who need to reinstall OES regularly (OES testers, DSfW testers) and who are fed up with searching for boot cd with team members (which I used to do before).

I took 32 bit OS as an example to show the steps. Please replace i387 with x86_64 for 64 bit OS installation.

1. Copy the kernel image and installation initrd to some directory on your system ( like /home) from the source server.

   For example: http://Build-server/sles10/i386/ is the source for the 32 bit OS image.

   wget http://<path to OS installation source>/boot/i386/loader/linux  
   wget http://<path to OS installation source>/boot/i386/loader/initrd

2. After copying the files, configure your grub configuration to boot these images in /boot/grub/menu.lst.
   

   ###Don't change this comment - YaST2 identifier: Original name: linux###  -- Original 
   title SUSE Linux Enterprise Server 10 SP2
       root (hd1,1)
       kernel /boot/vmlinuz-2.6.16.60-0.4-smp root=/dev/disk/by-id/scsi-35000cca002e2d91c-part2 vga=0x314 resume=/dev/sdb1 splash=silent showopts
       initrd /boot/initrd-2.6.16.60-0.4-smp

   If you have stored the images in /home/, host ip is 199.17.23.121, net mask is 255.255.254.0, gateway is 199.18.23.254, name server 199.17.23.121 modify the above entries like below.

   kernel /home/linux vga=0x314 netdevice=eth0 hostip=199.17.23.121 netmask=255.255.254.0 gateway=199.18.23.254 nameserver=199.17.23.121  install=http://<path to OS installation source>
       initrd /home/initrd

   Save the file.

3. Reboot the system. After rebooting it will come up with the installation screen of the OS to be installed. Start installing the OS :).