http://gtm.steamproxy.vip/groups/IWRPG/discussions/12/618463106370948492/

k

When you go to the options menu in a game and change any key its the exact same as binding a key. You can also do it via console for commands that aren't in the game's option menu.

It's as simple as this
Bind "[Key]" "[Command]"


Using the marine squad mod the commands your gonna want to use are.

Spawn human_marine_machinegun_follower
Spawn human_marine_pistol_follower
Spawn human_marine_rocketlauncher_follower
Spawn human_marine_plasmagun_follower
Spawn human_marine_shotgun_follower
Spawn delta4a_hazguy2_melee_flash <-- that may be flashlight instead of flash I dun remember.

So an example now is
Bind "o" "Spawn human_marine_machinegun_follower"
Now just like your left mouse click is bound to fire your gun the "o" key is bound to type that command into your console and will spawn that unit.

That's how it works.