Populating A scenery

[Python]

Salute

I'm new to the forums and this sim I have worked on other sims building maps what I'm doing now is building some scenery for WW1 across France,England, Italy, Germany, Hungury,Belgium. to do this and give them there proper cities roads and bases I am trying to figure out how to do the following any help on how to do any of this would be apprecated.

1. Build an allied and central drome(Airport) into a templet to use on all scenery

2. build a small farm village into a templete to use in all scenery

3. build a small city into a templete to use in all scenery

4. build custom cities such as Paris ,London and such

5. build factory complex into a templete to use in all scenery

6. import the roads and railway from google earth

7. make custom terrain of the front line area that would have bomb craters and mud with trenches along Flanders, Alscace, Marne, Verdun
Italy
Caprietto, Isonzo


So this is were I am at