Recruiting Generals?

[Charge]

Of coz possible.
Look on EDU (data/export_descr_unit.txt) find general's units (2 for each faction/culture), like..
gaul early general unit:

Spoiler Alert, click show to read: 

type barb chieftain cavalry early gaul
dictionary barb_chieftain_cavalry_early_gaul ; Barbarian Warlord
category cavalry
class heavy
voice_type General_1
soldier barb_noble_cavalry, 12, 0, 1
mount generals horse
mount_effect elephant -8, camel -4
attributes sea_faring, general_unit, hide_forest, hardy
formation 1.5, 4, 3, 6, 3, square
stat_health 2, 0
stat_pri 12, 7, no, 0, 0, melee, simple, piercing, spear, 25 ,1
stat_pri_attr no
stat_sec 0, 0, no, 0, 0, no, no, no, none, 25 ,1
stat_sec_attr no
stat_pri_armour 3, 6, 4, leather
stat_sec_armour 0, 0, flesh
stat_heat 2
stat_ground 0, -2, -4, 2
stat_mental 12, normal, untrained
stat_charge_dist 40
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 810, 110, 90, 130, 810
ownership gauls

as you see, general units has 'general_unit' attribute. Find units with this attr. and copy to building which you want them to be recruited from (eg governors build.):
EDB

Spoiler Alert, click show to read: 

governors_palace
}
}
governors_palace requires factions { barbarian, carthaginian, eastern, parthia, egyptian, greek, roman, }
{
capability
{
recruit "carthaginian peasant" 0 requires factions { spain, }
recruit "barb peasant briton" 0 requires factions { britons, }
recruit "barb peasant dacian" 0 requires factions { dacia, }
recruit "barb peasant gaul" 0 requires factions { gauls, }
recruit "barb peasant german" 0 requires factions { germans, }
recruit "barb peasant scythian" 0 requires factions { scythia, }
agent diplomat 0 requires factions { barbarian, }
recruit "carthaginian peasant" 0 requires factions { carthaginian, }
agent diplomat 0 requires factions { carthaginian, }
recruit "east peasant" 0 requires factions { eastern, }
agent diplomat 0 requires factions { eastern, }
recruit "egyptian peasant" 0 requires factions { egyptian, }
agent diplomat 0 requires factions { egyptian, }
recruit "greek peasant" 0 requires factions { greek, }
agent diplomat 0 requires factions { greek, }
recruit "roman peasant" 0 requires factions { roman, }
agent diplomat 0 requires factions { roman, }
upgrade_bodyguard 1 requires factions { barbarian, }
recruit "barb chieftain cavalry early gaul" 0 requires factions { gauls, }
}
construction 3
cost 1600
settlement_min large_town
upgrades
{

and for proconsuls pal., imperial pal. as well..

and you doesn't need making unit cards, I think..
But as in vanilla generals extremely overpowered, recommended to reduce HP in EDU

stat_health 1, 0