Installing this one is a bit more tricky than the older versions because involves adding 3 extra vehicles, replacing two and changing a pedprop.
Also optionally(and very reccomended) is replacing m_m_gunnut_01(ped model) for the soldier model. If you know how to add extra vehicles you should have no problem.

INSTALLING I.W.L IN TBOGT

1-Open the following files with notepad++ and add/modify these lines:


TBOGT/content.dat------>add this line: IDE common/data/milvehicles.ide
TBOGT/data/images.txt------->add this line: pc/models/cdimages/milvehicles
TBOGT/data/carcols.dat------>add these 3 lines below policew
								milpatriot,	56,56,56,
								barracks,	56,56,56,
								milsanch,	56,56,56,
TBOGT/data/cargrp.dat------->add in the # POPCYCLE_GROUP_COPS the following vehicles: police3, police4, policeb, avan, apc, milpatriot, milsanch, barracks  # POPCYCLE_GROUP_COPS

common/data/peds.ide-------->search for the M_M_GunNut_01 line and modify the CIVMALE, to COP, it should be like this: 
M_M_GunNut_01,		M_M_GunNut_01_p, 	COP, 		move_gng@afro_b,	GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_LO,		visemes@m_lo,		0, 		move_gng@afro_b,	null,			-1,-1,		PED_TYPE_PLAYER,	M_M_GunNut_01,  	VOICE_PLY_CR
(Remember that this last edit is in the common folder, in the main EFLC folder and that editing it, will affect TLAD too)

common/data/vehicles.ide----->change airtug and tuga lines to:
airtug,		airtug,		car,		AIRTUG,		PATRIOT,	VEH@VAN,	VEH@VAN_FO1_FO1,	100,	999,		0.3557,	0.3557,		0,	4,	1.5	,1,	livery+ext_requi+truckfirefx+ext_strong
tuga,		tuga,		boat,		PREDATOR,	RUSTBOAT,	veh@boat_standing,   NULL,	100,	999,		0.50,	0.50,		0,	5,	1.5	,0,	noboot
(this will affect TLAD too)

common/data/handling.dat------>modify the airtug line and change it to this one:
3500.0  5.0   85	0.0 0.0 -0.3   		0.5  5  0.15  1.0 135.0	0.2  0.65 0.7  35.0		1.1  0.85 17.0 0.15 0.49		1.1  0.7  0.9  0.15 -0.23 0.0  0.5  		1.0 1.0 0.8 1.3 	0.0  70000 		440020		0				0
(these changes will affect TLAD too)

2-Put the file milvehicles.ide in TBOGT/DATA/

3-Put the file milvehicles.img in TBOGT/pc/models/cdimages

4-Replace airtug.wft and airtug.wtd in vehicles.img with the ones included in the folder GTAVCrusader and
tuga.wft and tuga.wtd. Both files are included in the GHOST folder. (these changes will affect to TLAD too)

5a-Replace m_m_gunnut_01.wdd, m_m_gunnut_01.wft and m_m_gunnut_01.wtd in componentpeds.img with the ones included in the US ARMY folder.
5b-Replace m_m_gunnut_01_p.wdd and m_m_gunnut_01_p.wtd in pedprops.img with the ones included in the US ARMY folder.

6-See inside IV o EFLC folder and check the instructions to install the weapons.


NOTES: If you want to install the script on TLAD, it is the same, only that instead of putting the files in TBOGT/Data and TBOGT/PC/MODELS/CDIMAGES, goes on TLAD/DATA and TLAD/PC/MODELS/CDIMAGES.
The same goes for the editing files(content.dat, images.txt and carcols.dat). Remember that for TLAD, you still have to manually add the TBOGT vehicles(police3, police4, policeb, avan and apc).

NOTES2: Installing on IV it is similar, the only difference it is that you must add "IDE common:/data/milvehicles.ide" to your common/data/gta.dat instead of content.dat.
Remember that for IV, you still have to manually add the TBOGT vehicles(police3, police4, policeb, avan and apc).