^+1, Do not recommend puting on your SSD. If you lose your SSD, you may also lose the partion and therefore may not be able to access the image file.
After you have completed your Install use the windows 7 Backup, under control panel.
It will create a image of your C drive, just put it on either your internal HDD, or an External drive (DVDs or thumbdrive - => 16 gig). You can choice to create a repair DVD (Bootable) disk, or use your Win 7 installation disk to repair/fix/re-image your C: drive.