I am working on bases for these guys. The crossbowmen are the last units I need to field full painted Empire army for +- 1200 points.

Here are few pictures of converted banners for the crossbowmen (and one unit of halberdiers) step by step. I have desided to stay with my old method, as it gives you lot of options. Hope this could be helpful for others as well.
1) Cut of the halberdiers surrounding command group.

2) An easy way how to make banners different is to reshape the symbol on banner pole.

3) Use some pinning for areas that will need support.

4) Use green stuff to cover cuts and sculpt tails around the pins. Finished!
