on rct2 i got bored and was messing around with a twister coaster and i made a loop like a 3/4 of a loop merged a coaster with a loop and then the original ride and if that was confusing so i made a pic [:)]
its not that hard, it like hmmmmmmmmm how to explain it.........hmmmmmmmmmmmm ok you make a coaster ok it goes straight and then make it go up 10 ft(if it on 0 ft) build straight and then stop, take out the slope up to 10 ft and then build the track back to the coaster not over it but it should be 2 squares long, then you take another coaster and build a track piece under the track thats in the air do not let it touch with the other coaster, make 1 square apart from each ride so the track you want to merge into the first coaster, so its like theres a ten foot track over the coaster your merging it into, 1 square above the the ride your merging, and then change the track to alternative scheme 1, go to 8 cars per trainer and then edit ride stats and raise/lower and then pick alternatve 1 -2 hit apply but dont hit ok it will bring the track down 4 and when you merge it back do it with the merge on to the normal regular track [;)] that took long [:p]