Well, first Technic/Tekkit have to be updated to 1.3.1 (that will take anywhere from a week to a month) and second he needs to apply the textures to the updated mods along with the version of Dokucraft that is used
Didn't think of that, but you are completely underestimating the mod makers because most of them work hard and most mod makers have already started on making them SMP compatible so it will just give them a reason to speed up work on it.
Actually mods are easily made compatible with minecraft updates especially this one. Along with that the mods most likely won't change much. Plus if it took months there wouldn't be much time to play before the next update