The regular sight pusher will not work with the Tactical sights I don't think. Novak makes the CT sites being used now, Heinie made the ones for the CT before it was releases for civilian sales. The MeproLight adjustable sights or HK (they maybe the same sight, not sure) cost about the same and are very good.
Personally, I use a brass punch and hammer then clean up any brass marks with a copper remover like Barnes CR-10 on a Q-tip. Be careful and clamp your slide snugly but not over tightly in a padded vice, and you can drive out the sights and install them the same way. It does not matter which way you drive them or install them. That is the way I have done all mine and not had any problems. Just make darned sure you do not over tighten the vice and crush the slide. That would be very not good.