Some binaural beat programs also work with visual stimulation (not healthy for epileptics, I guess). You could look for bwg (Brainwave Generator), this one supports visualizations and special goggles. Other than that I cannot remember anything else I might have stumbled upon at this moment. Maybe you could check the Chaos Magick Group. The thread that deals with different methods to achieve the gnostic state could be of interest. Since trance and Gnosis are not quite the same, it could be of benefit nevertheless. -> http://ning.it/La9SBk
There are at least a few Technomagick enthusiasts present in the group. Maybe you can find some inspiration.