Here’s the setup I described earlier, that I used to shoot the Santa pics. My tripod-mounted (and cable-fired) Canon 1Ds MkIII and twin Bowens Gemini 400 Ws strobes into umbrellas, fired with Pocketwizards. The camera is powered with the mains adapter so it never turns off.
And here for good measure is pone ore shot I took there, showing Santa and an admirer:
Ho Ho Ho!