@Missy - they came out good - the ones that didn't break that is:-) I think some of the designs may have been a bit too thin/delicate for something that is not pliable such as formed chocolate. But the other ones (bitty flowers, leaves and birds) came out great.
About the modeling chocolate - there's a blog I follow and that is primarily what she works with. Check out -
http://www.hungryhappenings.com - there's recipes and methods for modeling chocolate on her site. I'm sure you can ask her some questions too. Let us know how it came out.
@Louise I think you will be rich too. Maybe you can try something like a stevia/truvia. I know it's not a sugar substitute per say and I don't really know how it is (I personally stay away from anything too altered), but it might be worth a try. Maybe it will be a low-glycemic hot cocoa instead of a sugar-free.
Roanne.