Step-1:
unzip the CSO with (winzip/winrar)
Step-2 Importent:
READ the ReadMe if there is one (normaly there is an ReadMe with an exactly instruction for installing)
Step-3:
check the unzipped CSO-Folder if there are another Folder with the same (not allways) name that includes allways two "ovl"s and one other folder (sometimes more)
Step-4:
copy this folder (not the first one after unziping) into your RCT3 Directory "Style/Themed"
Step-5:
check again if your folder if he is open shows your the "ovl"-files + folder
An little pic how it should be in the CSO-Folder when you open it up:
Why? Because RCT3 wont work with "folder in folder" CSO's and crashes if you are doing that wrong.
Most of the time with an "no svd" error!
All Folder are found the Main-Installation-Directory of your RCT3!
most CSO's goes to the "Style/Themed" - Folder
special CSO's like Pathes/Queues going NOT to "Style/Themed", they go into the "Path" and "Queue" Folder
CTR's goes to two different folders:
-> CTR-Trainfile goes to "Cars/TrackedRideCars"
-> CTR-Trackfile goes to "tracks/TrackedRides"
-> CSO with Effects/Particle animations going to "Style/Themed" and ALL Effectfiles "frw"s going to "ParticleEffects" Folder NOT to "Particles"
That's it for the basic. Hope this helps you out.
Lg Cheleste