I have tried once again to flash only parts of fiasco image (for testing). And I am not sure if it is going the right way. On the picture which I attached to this post you can see a messages for example:
"sending kernel image<1705 kB> ...
100% <1705 of 0 kB, avg. 1705 kB/s"

I wonder if value 0 KB in the text above is normal or not. In other words - was flashing really done?