If you have applied the latest patch, you should have the updated modding.pdf document in the documents folder of the game. In addition to that, you will find the Dom2 Database by yours truly a helpful aid. The Weapons & Armor and Units DBs can both be downloaded from
Arryn's site.
As for your questions:
1) Yes. However, you need to consult the mapedit.pdf for mapmaking instructions, as assigning specific pretenders to a nation is done through the mapfile and must be done separately for each mapfile.
2) The same way as you go about creating any other unit. If it's a brand new unit, you need the graphics files for it. Then you need to make a modfile that specifies the unit. Note that the unit is not assigned to any nation or poptype automatically. Poptypes can't be modded, but you can add units to national rosters by uisng the following commands:
Code:
#selectnation <nation nbr>
#addrecunit <unit nbr> //adds the unit to the roster of recruitable normal troops for the nation
#addreccom <unit nbr> //adds the unit as recruitable commander for the nation
#end
Edi