Here is the prior post on this: http://moi3d.com/forum/index.php?webtag=MOI&msg=5029.1

I believe the following is (mostly) correct.
Blend currently works with only two items at a time
With regard to the cylinder, Blend works with the edges, not the curves which may lay on top of the edges, so hide or delete the curves.
Mousing over the unselected cylinder, highlights (some) edges.
Select the cylinder after the curves have been deleted, then mouse over the edge to be selected.
Also need to delete any top or bottom face, or often its edge will be selected, not the edge of the cylinder.