Took me quite a while to understand it as english is not my native language. And what you are saying is very interesting, eventhough as you said it is hard to do, but not impossible.
Why am i then not able to do produce it in LFS?
Edit:Found my answer sorry to bother http://www.lfsforum.net/showthread.php?t=21535
And i was able to shift without using the clutch apart from the start, but if you get a push or stand on a hill and get to 4-6km/h you dont need the clutch at all. really amazing.