If you are using XP (not 100% on earlier OS anyone?),open the Theme in the Theme Creator,click preview all as you would when adding new areas during the creation process and then hit [ALT+PrtSC(or similar)] located at top right of your keyboard on pc,then go to your paint program and select 'paste as new image',then an image of the entire window including all 6 preview screens will be created.
Then simply crop to 176x220.

EDIT: Started this post with a big 'NO' but thought it looked a bit grumpy,so i deleted it lol