[plt-scheme] drawing in MrEd's pasteboards

hi,.

from the description of a pasteboard% it looks like it should be possible to do
similar path based drawing in a  within an editor-canvas% as in a canvas% draw
context. however, i cant seem to find an obvious way to get this working with
out resorting to creating bitmaps, then using image-clip%, is there a more
straightforward method of drawing into a pasteboard ?+

thanks,
znk