Have a look in your Solid Edge install directory... >>C:\Program Files\Solid Edge ST6\Training\Sheet Metal<< ...there are some files in there that will help. I do variations of these quite regularly....and is also done easily. [once you have the "AHA" moment]
Search the help file for "Lofted Flange"...the little trick to get rectangular sketch profiles to work nicely, is to add a small radius to the corners. [cleaner target area for the bends to converge]
Haven't forgotten you Pat.....incredibly high workload on my desk at the moment, and what I have started writing, is getting pretty detailed and convoluted. I will make some supporting videos to lessen the confusion that I seem to [so easily] be creating for myself. ;-)
Do you have a specific design case I could work the example to?
I might try to make this into a blog worthy post...may need a little help from @MLombard