This instal procedure is intended for users that are experiencied in making changes in dp and airfiles and want to use the new payloads along with their custom files:

1. Copy Objects_dp and Scenedb folders to you main CFS2 directory. DO NOT COPY the aircraft folder or your custom files will be overwrited. Copy the aircraft folder that is inside the "Advanced users" folder instead.
2. Copy model and texture folders, dp and air files from F4U1A_CORSAIR folder to F4U1C_CORSAIR and F4U1D_CORSAIR. Copy also the aircraft.cfg, if it is custom modified, but don't forget to change the aircraft name in it.
2. Now, you need to manually replace the payloads in the dps with the ones provided in the text files "payloads 'x' inside each folder. Remember, backup your files before change them.
3. Inside "C" and "D" versions folders, there is also airfiles named "fuel tanks" which contain the two entrie that allows the use of two external fuel tank. Use this airfile to replace 534 entrie and add 535 entrie inside the corsair airfile. Its also recommended to change the 534 entrie in the "A" version to better represent the 170gal external tank. Remember again, backup your files before change them.
4. In order to have the correct weapons names displayed by the sim, you need to copy the entries in mdl_names.txt provided here to the mdlnames.txt in the main CFS2 directory. Once more, make a backup of the file before change it and put it in a safe place.
5. Done! Now, next time you start CFS2, the aircrafts will be ready to use.

Uninstall:

There is a list of files that needs to be removed:

In Objects_dp folder:
WEP_DB_154gal_drop_gp_a.dp
WEP_DB_154gal_drop_gp_b.dp
WEP_DB_154gal_napalm_a.dp
WEP_DB_154gal_napalm_b.dp
WEP_DB_170gal_drop_gp.dp
WEP_DB_Brewster_rack_L.dp
WEP_DB_Brewster_rack_M.dp
WEP_DB_Brewster_rack_S.dp
WEP_DB_f4u1a_hook.dp
WEP_DB_F4u1c_Cannon_a.dp
WEP_DB_F4u1c_Cannon_b.dp
WEP_DB_f4u1d_rocket_pylons_la.dp
WEP_DB_f4u1d_rocket_pylons_lb.dp
WEP_DB_f4u1d_rocket_pylons_ra.dp
WEP_DB_f4u1d_rocket_pylons_rb.dp
WEP_DB_f4u1d_wing_pylon_a.dp
WEP_DB_f4u1d_wing_pylon_b.dp
WEP_DB_f4u1d_wing_pylon_covered_a.dp
WEP_DB_f4u1d_wing_pylon_covered_b.dp
WEP_DB_f4u1d_wing_pylon_sway_braces_a.dp
WEP_DB_f4u1d_wing_pylon_sway_braces_b.dp

In scenedb\weapons\Scenery folder:
db_corsair_weapons.bgl

scenedb\weapons\texture\
Db_brewster_bomb_rack.bmp
Db_f4u1a_fuel_tank.bmp
Db_f4u1a_hook.bmp
Db_f4u1c_cannon.bmp
Db_f4u1c_cannon_blue.bmp
Db_f4u1d_rocket_pylon.bmp
Db_f4u1d_rocket_pylon_blue.bmp
Db_f4u1d_weapons.bmp
Db_f4u1d_weapons_blue.bmp

Of course, you also need to restore your previous saved Corsair files.