The IV Models for Bas Rutten and Jeremy St. Ives converted to PC from the 2007 Beta build that was on an Xbox 360 Devkit.
Both their Ingame models and Cutscene models are included (Although the CS models aren't really useful for most people)

You can rename the files to replace any ped or if you know how to add peds to the game you can do that
(such as through the "newchar.ide" from the Character Fixes mod)
I would put the IG peds in componentpeds.img, if you decide you want the CS peds, I would put them in cutprops.img

These are the Ped.ide lines from the Beta Build:

CS_Baz, 		CS_Baz_p,		CIVMALE, 		move_player,		GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_HI,		visemes@m_hi,		0, 		move_player, 		null,			-1,-1,		PED_TYPE_PLAYER,	BAZ_PVG,  	VOICE_PLY_CR    
CS_Jeremy,		null,			CIVMALE, 		move_player,		GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_HI,		visemes@m_hi,		0, 		move_player, 		null,			-1,-1,		PED_TYPE_PLAYER,	JEREMY_PVG,  	VOICE_PLY_CR    

ig_Baz,			ig_Baz_p,		CIVMALE, 		move_player,		GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_LO,		visemes@m_lo,		0, 		move_player, 		null,			-1,-1,		PED_TYPE_PLAYER,	BAZ_PVG,  	VOICE_PLY_CR    
ig_Jeremy,		null,			CIVMALE, 		move_player,		GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_LO,		visemes@m_lo,		0, 		move_player, 		null,			-1,-1,		PED_TYPE_PLAYER,	JEREMY_PVG,  	VOICE_PLY_CR    


Jeremy in the gamestop commercial for the game appears to at times use the walkstyle "move_gng@generic_c"
so you here his peds.ide line with the player walkstyle replaced with that one, although you could just change it with a trainer.
move_gng@generic_c

ig_Jeremy,		null,			CIVMALE, 		move_gng@generic_c,	GESTURES@MALE,		GESTURES@M_PHONE,	FACIALS@M_LO,		visemes@m_lo,		0, 		move_gng@generic_c, 	null,			-1,-1,		PED_TYPE_PLAYER,	JEREMY_PVG,  	VOICE_PLY_CR    


Pedprops:
Bas has unused props with glasses and a hat, I have included the ones that were left in TBoGT
as The devkit build seems to have converted improperly and they are pretty much exactly.
The beta build also only has the glasses for his ingame model.
Drop the pedprops into pedprops.img if you added Bas with newchar.ide