If you have any question about the Left 4 Bots addon post it in this thread.
But before you post, search the thread, it is possible that your question has already been answered.

Here are some of the Frequently Asked Questions:

Usually it's "C:\Program Files (x86)\Steam\steamapps\common\Left 4 Dead 2\left4dead2\ems\left4bots\cfg\".

Yes. Addons that only change cvars, like these 2 addons, are 100% compatible with Left 4 Bots, however L4B has cvar changes too.
These changes are contained in the file "convars.txt" and you can change them like you want.
In the "settings.txt" file you can change the option "load_convars" to "0" to tell L4B to skip the "convars.txt" loading so it won't overwrite the cvar changes from the other addons.

I don't know, depends on the other addons, some of them might cause conflicts with this addon even if you don't see them marked red in the addon list.
If you suspect the addon isn't working correctly, open the console and look for vscript errors. If you find these errors it is possible that one of your addons is conflicting with this one.

I installed sourcemod / metamod (latest stable versions) on my test dedicated server and it's running just fine.
It is possible that some of the plugins aren't compatible though.

In COOP mode you need to start the scavenge with the vocalizer command "Lead" (or the chat command: bots lead).
In SCAVENGE mode they start automatically.
You can always stop the scavenge with one of the following vocalizer commads: "Help", "Hurry up", "Move on", "Stay together", "Follow me".

In the "settings.txt" file you can change the value of the "scavenge_max_bots" option.
Default value should be "2" but i mistakenly set it to "1", i'm sorry for that.
If you want all of them to go scavenge you can set "4", but don't forget that the bots are vulnerable while scavenging, don't leave them alone for too long.

You send the bots to the generators with the vocalizer command "Lead" (make sure to clear the area around the generators first so they aren't disturbed by the zombies).
If 1 or 2 generators are already activated, the bots will activate the remaining ones immediately.
If all the 3 generators need to be activated, the bots will stop near the generators and you need to use the vocalizer command "Go" to tell them to activate the generators.

NOTE: the "Go" command is not available in the stock vocalizer, you need a vocalizer addon to use this, or you can use the chat command: bots go.

Look at the bot you want to send and use the vocalizer command "Look" (your character calls the bot's name) and within 3 seconds you need to look at the witch to kill and use the vocalizer command "Witch" (or use the chat command: [botname] witch).

NOTE: the "Witch" command is not available in the stock vocalizer, you need a vocalizer addon to use this, or you can bind the command to a button:
bind F10 "vocalize PlayerWarnWitch"

Yes, just look at the bot you want to send and use the vocalizer command "Look" (your character calls the bot's name) and within 3 seconds you need to use the vocalizer command "Lead" (or you can use the chat command: [botname] lead).
NOTE: it might not work in all the maps, especially in the last map of a campaign where there is no end saferoom. Sometimes they can get stuck if they can't path to the saferoom, in this case cancel the order with any of the following commands: "Follow me" / "Help" / "Move on" / "Stay together" / "Hurry up" (or whatever you remapped this to in the vocalizer.txt file)
NOTE2: keep in mind that while the bots move to execute the order they don't shoot the infected and do not pickup weapons. This command is intended to be used for a short time just to find the way when you are lost. After you found the way and/or there are many infected around and/or things to pickup, it is a good idea to cancel the order.
NOTE3: this doesn't make the bots push the buttons / activate things, they just move towards the saferoom.
NOTE4: keep in mind that their path finding system isn't great, they always go for the shortest path. Sometimes they might think that it's a good idea to jump off a ledge to reach the saferoom. This addon can't fix that so use this command carefully.

Yes, you can do it by editing the "ems\left4bots\cfg\vocalizer.txt" file.

The stock vocalizer should be bound to the Z and X keys. If you download a vocalizer addon you will need to bind the extra menu to other keys.

Yes. If you (like me) use to spam the vocalizer a lot and you don't want to send random orders to the bots you can disable this feature in the "settings.txt" file setting "vocalizer_commands" to "0".

Yes, check here:
https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/2279814689/2965019884822668594/

Yes, you can use the chat command: !l4bsettings [option] [value]

Their scavenge logic is not bound to specific maps and it might work in custom maps too but i cannot guarantee this because i tested only in the offical ones.
You can always try though.

Yes, just look at the thing to activate and type "botname use" in chat.
There is also some kind of automation logic that allows you to make a bot activate the next thing that need to be activate (or opened) just by using the "Lead" command (like for The Sacrifice finale) but it works only in a few official maps at the moment.

Yes but this kind of automation has been implemented only in a few official maps at the moment.

Yes they will. However they can't always complete the map without the human intervention. In some maps they can get stuck if there is no human survivor alive.

In the "settings.txt" make sure the options "throw_molotov", "throw_pipe_bomb" and "throw_vomitjar" are set to "1".
The bots will throw molotovs only at the tank as long as the tank is not already on fire and his health is 1500+.
The bots will throw pipe bombs and bile jars only in the following situations:
- They are being overwhelmed
- One teammate near them is being overwhelmed
- Before reviving an incapped teammate if there aren't at least 2 non-incapped survivors around
- At random at the end of the campaign, when they are running to the escape vehicle

Not by default but you can change the value of "sb_max_team_melee_weapons" in the "convars.txt" file to enable this. The value is basically the number of survivors allowed to use melee weapons so 0 = no bot will pickup melee weapons, 4 = all the bots will pickup melee weapons.

Like you do with pills and adrenaline. Hold the grenade, look at the survivor and press the right mouse button (you need to be close enough to the other survivor)