Both aircraft are intended for FS2004 but will work fine in FSX with a few simple mods. Let's take this one at a time.
First of all
The simulated aircraft will show up...but...all three aircraft for the Fleet Freighter only show in one color (white)
All three examples of this aircraft have blank textures. For different liveries you have to add the various repaints. (See below)
-no pictures for simulated aircraft in FSX aircraft category selection
This applies to all FS2004 aircraft in FSX. FS2004 does not use thumbnails on the selection menu. This is easy enough to fix. Rename a screenshot of the specific aircraft to thumbnail.jpg. Then paste it into the Texture folder of that aircraft.
-no sound for either simulated aircraft
Again, a common bug with FS2004 aircraft in FSX. The sound of both types is aliased to the FS2004 default Tri-Motor which is not included with FSX. To fix it you can paste a copy of the Sound folder of any suitable aircraft (like the default Beaver) into the main folder of the Fleet & Junkers. Overwrite the existing Sound folder when prompted.
-textures will not show for Fleet Freighter and not sure how to add them in Aircraft CFG File as could find no info...
Strange that no example CFG entries are included. Again, if you're used to adding repaints it shouldn't be a problem.
Open Aircraft.cfg of the Fleet in Notepad. Highlight the original [fltsim.0] entry & copy it. Then paste it below itself & change the four lines in Bold type to recognise the new texture. I've used the Tundra version of the aircraft with the BCATP texture in this example. Note that the new texture folder name is
texture.BCATP . Use the
exact name following the period in the new texture= line.
[fltsim.0] title=Fleet 50K Tundra L-6MBsim=fl50tundra
model=tundra
panel=
sound=
texture=basekb_checklists=Fleet50K_check
kb_reference=Fleet50K_ref
atc_id=CFBJT
atc_id_color=0x00ffffff
atc_parking_types=RAMP
atc_parking_code = 1
ui_manufacturer=Fleet Aircraft
ui_type=50K Jacobs Tundra L-6MB
ui_variation="
Cargo Tundra BLANK"
description=Engine: Jacobs L-6MB Radial.
atc_heavy=0
atc_airline=
atc_flight_number=
atc_id_font=Verdana,-11,1,600,0
visual_damage=0
[fltsim.1]
title=Fleet 50K Tundra L-6MB BCATP
sim=fl50tundra
model=tundra
panel=
sound=
texture=BCATP
kb_checklists=Fleet50K_check
kb_reference=Fleet50K_ref
atc_id=CFBJT
atc_id_color=0x00ffffff
atc_parking_types=RAMP
atc_parking_code = 1
ui_manufacturer=Fleet Aircraft
ui_type=50K Jacobs Tundra L-6MB
ui_variation="Cargo Tundra BCATP"
description=Engine: Jacobs L-6MB Radial.
atc_heavy=0
atc_airline=
atc_flight_number=
atc_id_font=Verdana,-11,1,600,0
visual_damage=0Repeat the procedure for other variations.
A very unusual aircraft. I've not heard of it before.