It's kinda hard to explain without being able to attach images at the moment.
When you hit Backup in Shrink, after doing all your re-authoring stuff, under the Target Device tab should be a drop-down list, with your burner selected by default. Click the arrow on the menu, and choose ISO Image File.
Underneath that, type in where you want it saved (e.g. E:\DVD_VIDEO.ISO)
Edit: LOL, Geno beat me to it :bigsmile: