Thanks TIG, though i think that is like the one i did already.
with this workaround, you don't get the type of 'import as image' interaction (which allows you to position/align AND scale the image in one comfortable action).
in other words, i'm trying to get exactly the same behaviour as 'sendaction 21200' - which works on a pc but not on a mac. i spent the whole of bank holiday monday on this, and concluded there is not a way to replicate it...(that's why the padded cell!).