Quick question Smoke and Gas

[Hoplite1963]

Hi Guys

In am Currently working on a 1919 scenario where I want both sides to have access to smoke and gas shells. Managed to get gas shells to work but not smoke ones. It looks as if for this version of CS that the key to depress (i.e. the ALT key)  for gas is the same as for smoke so that smoke is not currently available in the game. Is this the case, (if so its no big deal) and if not what are keys to depress to access smoke and star shells?

Kind regards
Ian