Personally, I'd start them with less BP than usual, say, 360 instead fo 400, but build an equipment list that each will get ... a Standard Package, then one for a decker and one for a mage (Hermetic, natch. Who'd hire a shaman, hah!) ... then provide some extra resources that they can call up in limited number. The corporation's assault chopper is usually in for repairs or being used by higher-ranking soldiers. They can get it, but, only rarely.
This makes sure that they'll have a uniform, armor, comm gear, weapons, etc, but that they're clearly corporate property that's being loaned to them, not their own personal gear.