Migrate Win 7 Legit OS without Installation Disk

Windows 7 has a built in system image. Burn it on to a disk, swap to new HD and install the image on your new drive. Type “backup” in start menu and it will pop up.

Quick guide on using Backup:

http://windows.microsoft.com/en-US/windows7/products/features/backup-and-restore

Guide on how to restore from a image disc:

http://www.howtogeek.com/howto/7702/restoring-windows-7-from-an-image-backup

Another option: Digitalriver windows 7 sp1 images

Backup the activation:

http://www.davescomputertips.com/2011/08/how-to-do-a-clean-install-of-windows-7-without-activation-on-your-oem-computer/