Took some hunting to find this information so I thought I would make a post so other may not have to waste an hour.
If you wish to practise Left for Dead 2 versus mode you will have to use the following console commands:
c1m1_hotel versus
sv_cheats 1
sb_all_bot_team 1
sb_unstick 0
vs_max_team_switches 99
bind "F1" "z_spawn boomer"
bind "F2" "z_spawn smoker"
bind "F3" "z_spawn hunter"
bind "F4" "z_spawn charger"
bind "F5" "z_spawn spitter"
bind "F6" "z_spawn tank"
bind "F7" "z_spawn witch"
chooseteam
It would be better to copy and paste that lot into a text file and name it practice.cfg and save it within you cfg directory. Then you would simply be able to use the command exec practice.cfg from the console. To spawn as any give creature use the F keys as listed.
Happy wall jumping
