INSTALL METHODS:

(Lazy) 

Simply rename & replace any unused or mostly unused pedestrian model in 
componentpeds.img for basegame Grand Theft Auto IV you'll find in
GTAIV>pc>models>cdimages

(Smarter)

Rename this model to the name of a story pedestrian from 
basegame Grand Theft Auto IV who is not seen in normal gameplay in 
The Ballad of Gay Tony (such as ig_gordon). But you won't be able to play with him
in basegame GTA IV or TLAD.

(Smartest)

Use the newchar.ide method. 

Drag and drop the files for this model as-is, without renaming, into basegame
Grand Theft Auto IV's componentpeds.img

If you don't have one already, make a new plain text file with the appended extension,
newchar.ide, which will include lines for ADDITIONAL pedestrians in your game, 
add the line from newchar.ide.txt from this mod to your IDE, and put it in
GTAIV>common>data.

But in order for your game to *read* this new IDE file, you must add THIS to the end of your
gta.dat file you can find in GTAIV>common>data.

#
#  Characters
#
IDE common:/DATA/newchar.ide