Slow motion stuff is actually pretty easy. Add a "time" block to the timeline. There will be two values on it. The one I've used is the "Time Value." It just marks how many seconds have passed for each ghost's replay (I.E. Time Value "0" is the start of a run and Time Value "60" is one minute in). Therefore, just edit the first and last keys to make a slow, fast, or even reverse motion portion. An example would be to take a one minute clip of racing, add a time track that runs from 0:00.00 to 1:00.00, and make its first key have a Time Value of 0 and its second key a Time Value of 30. In that replay, everything would be moving at half speed, since the time starts at 0 (the beginning of the car's replay) and takes one minute to get to 30 seconds of the car's replay. Does that make sense, or did I just make it more confusing?