I think the only thing wrong is you don't go to view, you go to wizards and they should show up there.
you need to put them in a new folder under mach3\turnaddons\my turn
put the turning.set and turning.set.def here
Then make a subfolder in the folder my turn, called bitmaps, this is where the bitmaps are put.
Then when you run mach3 don't use view, just go to wizards and it will show up in the list there.