Queston about making my own scenarios

[Aragorn]

Good Morning to you all. I'm not new to PZC, but trying my hand at creating my own scenarios at the moment. I have some questions for the more experienced guys.

I would like to give an example. I'm thinking about making a scenario of  the fourth battle for Kharkow in August 1943. I know exchanging maps between two PZC games isn't possible, so I would like to use the large Kharkow map in Kharkow 43. Am I right when I say that it is possible to create a new OOB in Kharkow 43, creating new units and using the unit icons from other PZC games, like for instance Korsun 44?

Another question. I own PZC Normandy and would like to make a new setup for the German side, not for the Allied side. I'm removing all German units one by one from the map, in order to be able to place them on the empty map and a different location. Is there a way to remove all German units in one go?

Thank you in advance for your help.