1. A zeroing method for a firearm shooting simulator, which method includes at least the steps of: sighting a firearm having an image capturing device associated therewith, aiming at a first point on a target, which first point is a centre of the target; capturing at least one image of the target; automatically determining a second point on the target corresponding to a centre of the image captured; automatically determining any variance between the first and second points by quantifying the distance and direction of the variance between the first and second points; when the firearm shooting simulator is in a post-zeroing, shooting condition, automatically compensating for the variance when further images are captured, so that accurate zeroing of the firearm shooting simulator at the target is achievable without having to precisely align two or more of the image capturing device, a barrel of the firearm, and a sight of the firearm with each other; and automatically creating a virtual target centre by calculating the mean point of impact (MPI) using one or more second points.