The only way I've found to do this is to spawn the bots manually. It'd be nice if they chose a random skin like you can do using the command:
realbot add [team] [skill] -1
What I did was make a .cfg file that spawns 4 bots (T or CT depending on .cfg) that has these lines:
realbot add 2 0 1
realbot add 2 0 2
realbot add 2 0 3
realbot add 2 0 4
You can put in a 1 for T team, and a skill higher than 0 for less than godlike skill level.