"Not any more than you could teach someone to be a psyker. Jokaero skill is somewhat innate. For the suit at least, the Stalker would have needed to find one somewhere, or so I suspect. For their other devices.. well, the current rumour is they've got some means of bypassing security systems. I can think of a few people who could do that sort of work, myself included, but I can also tell you I haven't done anything like that recently."