Diolma:
Thanks.  I spent a few hours last night poking around Wings and figured out how to split the rectangle polys into triangles.  I tried converting some of my existing dynamic cloth items and ran a few test simulations.  I have to say that just this step has really increased the flexibility of dynamic cloth.  Haven't tried converting the sheet yet, but I'm optimistic!

ptrope:
Thanks very much for the improved hi-res square.  I will try the simulation tonight  and post the results.

David