How to Make Playermodels and NPCs for Garry's Mod

A long time ago in 2009, I made many different playermodels for a game called Garry's Mod. I made this tutorial a long time ago, but I decided to make a copy of it here before it eventually gets purged from it's original post.

Many of the things listed below may be outdated, the steps for preparing the model are mostly the same.
Here are the steps you should follow to get started.

Step 1. Decompile the model you want. 
Crowbar seems to work for most people and all of the older tools no longer work after the SteamPipe update.
https://steamcommunity.com/groups/CrowbarTool
(I put my decompiled models in my documents "decompiled models/<nameofmodelhere>" so I can go back to it later)

Step 1.5 
Can't decompile the model? Open the .mdl in notepad and change "IDST0" into "IDST," 

2. Get Notepad++
http://notepad-plus.sourceforge.net/uk/site.htm
It's a lot better than the default notepad that's packaged with windows. Plus it gives you numbered lines to help you identify errors easier when they arise.

Step 3. Edit the model .qc 
You might want to change the model path so you don't overwrite any other models.
So just edit this line to where the model will go

$modelname "<modelpathhere>.mdl"
ex. $modelname "$modelname "player/barney.mdl"
(the models subpath is added automatically)

and change the "$includemodel" to what you want it to be.
Here's a list of your anim choices

Animation Types and Combos

If you're making a CS:S model into a playermodel, you will want to remove this line. Otherwise you may end up with weapons not being positioned properly.

Fix for "Crotch Guns"

If your compiler says: "Eyelid "lower_right" neutral out of range (+-0.5)"

Then remove these lines.

If your compiler says: "unknown flex AU27ZR"

Then remove the flex at the end of the flex data just above the $lod stuff and one of the parentheses at the end of the line

Step 4. Compile and Test
Download and install GUI studio mdl,

http://www.wunderboy.org/apps/guistudiomdl2.php

by now you should be able to just compile it, go to the target directory, retrieve your model, and be able to fully use it.

Open the Source SDK modelviewer to test your model.

When you've tested all of the anims in modelviewer, you may then proceed to add your custom playermodel / NPC to Garry's Mod.

Make a lua file in "garrysmod/garrysmod/lua/autorun" and name it the whatever you want (you might want to name it whatever the model is named and add "_player" to the end)

Open the lua file and add these lines for a playermodel.

Player Manager Template

Here's an example

Player Manager Example

Make a lua file in "garrysmod/garrysmod/lua/autorun" and name it the whatever you want (you might want to name it whatever the model is named and add "_npc" to the end)
Open the lua file and add these lines.

NPC Template

Here's an example

NPC Example