Tutorial comes unstuck in Blend 3 (datatemplates)

Hi, I am in the middle of this so far excellent tutorial but at this point the tutorial does not seem to apply to Blend 3. On adding a datatemplate:

Data Binding to CLR Objects - Page 5

I’m fairly new to C# and Blend so things are looking a little confusing.

Could someone please describe the new steps I must take for Blend 3?