You can make a "slipstream" disc that will contain Vista plus the SP2, or just copy the SP2 to a separate disc.   Just copying it to a separate disc is the easiest way as you will not have to download the service pack again.  How to slipstream Vista
Hi,       I own a dell inspiron 1525 with the windows vista home basic service pack 1 DVD.       Recently i have updated the OS with vista service pack 2.  Now can anyone tell me  how i can make the recovery CD of OS with the existing service pack 2 so that i don't have to  update it with 400 MB service pack again after reinstalling the OS.        i have buyed this in May-2009. guys pls help me out of !!!!!!!!!!!!! Regards, Swapnil
back up OS with Service Pack?