The moving part of the steering locks are electro-mechanical (i.e. have some sort of actuator in them to operate the "lock") so I don't think you'll be able to get it to operate without ignition, unless someones found a work-around.
Just a thought, do the crash sensors have a dedicated fuse/relay? If so, would removing that enable you to turn on ignition? ECU might throw a code, but that could be deleted later on etc.