yes i saw many theards about it.. but i think i found a way how to do it
My idea is spawn info_null, and give mins/maxs, and give him classname or something, then check if player touching it - set velocity[2] to 250.0
(ah yea check the player pressing moving keys or no ? then add sounds and so on, also spawn at same place the model or skin or something else)
Have fun! 2morrow i will try todo something too