I just downloaded several Mix Master fireworks displays and temporarily put them in "my documents". There is a RCT3 folder, but I don't know where to put the Mix Master files. This is my first time downloading files for RCT3. Thanks.

oooh been a long time sience I've done this but its
A. A FireWork Display/Mix Master in the documents,
or B. Its in C:/ProgramFiles/Atari/RCT3

Hope this helps!