I'm rapidly forgetting everything I've learnt since BF2 came out, but I think I can help....keep a backup of your work so far just incase
If you just want to change the main base spawns so they spawn as paratroopers, edit the soldierspawntemplates.con file:
add ObjectTemplate.setSpawnAsParaTroper 1 to the bottom of all the main base spawns (they should all be the same group e.g: group 1 allies main base, group 5 axis main base)
edit the soldierspawns.con file:
increase the y co-ordinate (x/y/z) by 50 or higher on every soldierspawn you added paratroper to above.
Object.absolutePosition 945.126/(17+50)67/985.138
I think that will work....
If you want to add extra paradrop spawn points, follow the tutorial for adding extra spawn points (it's for DC), but increase the y coordinate.........
it'll take a lot longer.
Make sure nobody can drop behind buildings or into closed off buildings or you will have a serious wallhack problem.