ok first u open up ur replay that u want to cut, (i upload pic's if needed) then delete all ghost u dont want, then u click the time line and then drag the red line (the one that moves when u play it) to were u want it to beggin and click insert key.
then u do the same but were it should stop
then u click the key in the very beggining of the time line and hold ctrl in and click the biggining key while holding ctrl so it ''change screen'' to the begining frame. then u click the very last key and hold ctrl and do the same but click the end of ur trick so the end frame pops up.
then drag the very end and very beginning towards the keys to ur trick
NOTE: !! DO NOT DRAG THE KEYS THAT BELONGS TO UR TRICK COZ IT WILL GO EIGHTER REALLY FAST OR SLOW WHEN U PLAY IT!then click in the middle of u trick and drag the small piece thats left the the begining and just drag the camera and ghoste lines so they are shorter then the timeline then press ''show full timeline'' (the one thats looks like arrows that point to eatch side) and drag the ghost and camera so there the same length as the timeline
NOTE:DO NOT DRAG THE KEYS THAT BELONGS TO UR TRICK COZ IT WILL GO EIGHTER REALLY FAST OR SLOW WHEN U PLAY IT! then its done
just save if u have any probs just tell me
might be many typos coz i write faster than normal but live with it