This steel studing is all new to me and I have never done it or actually any information about it. However, in an Oshman's Sporting Goods store where I was working on an addition, they were using all steel studding and doors were installed everywhere WITHOUT and wood on the premisis.
I was told by a carpenter on the site when I was nosing around that steel studing takes a bit longer to install than wood, but when and only when the wall board is installed does the strenght come in. Before the wall board is hung, you would not think that the walls would hold up.
The studs do flex and contourt as you mess with then when installed. The doors I saw that were unexposed, were using kings, cripples, and all the same bracing as you would with wood framing.
But, again, all I saw was the wall studs up without the siding up.