Questions about the Heroes 4 map editor.

Please help! I can't place heroes in the editor. Also, could you provide a link to a good tutorial for the editor? Thanks in advance.

If possible, please be more specific. ;)
Which heroes, where, and what's the problem? You see, I also can't figure out how to place a hero in a flower pot; it just won't work. :(
If you have the time and inclination, you can click "Help" in the editor's header, then "Contents".

P.S. People, help me too. I need to look at a map with a lot of bombs. How can I deal with them quickly? In the bomb properties, there's an abbreviation; how can I link it to specific events?