So I created this mod because there were a 2-3 people on the forms that really wanted it and it seem simple enough. I didn't plan it to be a complete mod but since there are requests to add more details and how to install, here they are. Sorry that I half ass this before

This mod is an edit on the SpawnCompanion 1.22 mod found here http://www.nexusmods.com/witcher3/mods/1681/? (by veggielion). The original mod is out of date but can be found here http://www.nexusmods.com/witcher3/mods/348/? (by skacikpl)

This mod requires the a debug console mod that can run with witcher 3 version 1.22
I am currently using Dbug Consile Enabler found here. http://www.nexusmods.com/witcher3/mods/1687/?

You do NOT need the original Mod or the v1.22. This will do everything (will overwrite original mod (if installed) since the paths/names are the same)

Installation
Auto
I personally recommend using nexus mod manager. Giving it the path to the game and letting it sort it out. This is good for a few reasons. 1 it is so much faster and easier then manual. 2 when you uninstall the mod (like you really want to, right? =D) then it can be done with a click of a button. 3 there is less chance something important to the game is deleted while you uninstall the mod.
To do this
1. Download with the NexusMod manager Client.
2. Find the mod in the list
3. Clink enable (may have to say yes to overwrites if you have an older version installed)
Congrats you have the mod installed!!!

Manual
For those who like it hard these are the steps.
1. Download the .zip file and unzip it, you will see a folder called "modSpawnCompanions"
2. Locate your witcher 3 game file (if on Steam it will prob be something like  C:\Steam\SteamApps\common\TheWitcher3)
3. Locate the Mods file, If it isn't there create on (ie if you haven't added a mod yet) - should be there since you NEED the debug console for this mod to work
4. Drag and drop the modSpawnCompanions file into the Mods folder
Congrats you have the mod and did it the hard way!!!!

This mod was created to allow players to spawn 2 Companions that will walk, fight, and fast travel with you. Any and all commands will be entered through the debug console which can be accessed using the tilda key (`) the one to the left of the number 1 on your keyboard.There are two sets of companion commands that control each companion respectively. The first companion will have normal commands while the second will be commands will all end in 2. When Spawning your companions there are 3 Optional arguments that can be added. These are can be 1 or 0 and determine if the follower has their portrait/hp show, immortal, and has a visible hud respectively.
Example:
To spawn the first companion:
SpawnCompanion (Ves,0,0,0) - This will spawn a Ves Companion that doesn't have a portrait/hp shown, can die, and no hud is shown
SpawnCompanion (Ves,1,1,1) - This will spawn a Ves Companion that has a portrait/hp shown, cannot die, and has a visable hud

SpawnCompanion2 (Ciri,0,0,0) - This will spawn a Ciri Companion that doesn't have a portrait/hp shown, can die, and no hud is shown
SpawnCompanion2 (Ciri,1,1,1) - This will spawn a Ciri Companion that has a portrait/hp shown, cannot die, and has a visable hud

CallCompanion - will teleport the 1st companion (in my example Ves) to player position
CallCompanion2 - will teleport the 2nd companion (in my example Ciri) to player position

Possible commands include
RemoveCompanion -Removes associated companion
RemoveCompanion2
CallCompanion - teleports the companion to player location
CallCompanion2
CompanionEquipTorch - Companion equips torch (maybe a little buggy) left over from the original mod
CompanionEquipTorch2
CompanionLightTorch - Companion lights equip torch
CompanionLightTorch2
CompanionEquipShield - Companion equip a shield (maybe a little buggy)
CompanionEquipShield2

As for which npc you can have. The list is exactly the same as the console commands for summoning enemies (NOT CASE SENSITIVE). the list can be found here. http://www.mmo-game.eu/witcher-3-spawn-humans-bosses-monsters/

There are a few special cases that you can have as companions that are not listed and include (THESE ARE CASE SENSITIVE)
Lambert
Eskel
Ves
Roche
Ciri
AFuckingHooker
Keira
Sorceress
Yennefer
Triss
DemonWitcher
These were added from the original creator skacikpl

I think that's it. Have Fun Guys and Gals!
If you have any other questions you can leave them in the comments section