Basically, don't change gears. Walk. Eventually, walk fast. But only if you walk slowly at first, then at medium speed. Walk at medium speed (flat walk) until you are bored to death.
It isn't like asking for a trot or canter. The difference between walking and running is barely there, unlike the "proper" difference between a walk and trot. It just like asking for an extended walk on a regular horse.
That won't feel "like a gait" because people think that a running walk is a speed gait. It just isn't. Even a "fast" running walk is a "slow" gait, compared to a trot. Don't think you'll be ripping up trail at a proper running walk.
Increase speed slowly and gradually. If you feel a pace (any change of gears), slow 'em down.