Hmm, I should give this a go. No custom scenery would help for me as I haven't the time to find, create, nor figure out how to use such custom scenery sets. I don't have TT either and refuse to install WW. Both are a waste of money, but they come with every copy of RCT2 these days if you can even find it.
Jcoasters has the right idea. At least allow 8 cars per trainer for the disabling of collision detection, the speeding up of lifts, and the breakdown fix for such rides. Judge it on realism. The lift hill hack is very common and without it, it is impossible to build many types of rides.