I use BotSpawn, by Steenamaroo.
Recently he added an option for headshots instantly killing them which is pretty good, however - now when you insta-kill headshot a bot - Deathnotes doesn't know what happened and brings up the deathnotes for "*" when it doesn't know what killed them?

That'll likely have to be fixed in BotSpawn. BotSpawn needs to specify the correct information for the kill, otherwise DeathNotes doesn't know what to do.

Ahh ok. That makes sense. Thanks for the response mate!