On the particle/sound front, these are actions added on a empty scene node. Ok I should explain a little more....
The thing with Skyline is that that all objects in the scene are presets, made in Skyline, apart from the base types so anyone can change or create their own favorite objects suitable to their workflow.
Objects in the scene are built out of a combination of devices, base type: light,model, material etc , actions being particles, sounds, scripts etc
A combination of these is then stored to disc as a preset. The current rmb presets for particle and sound are built on an empty node that is invisible in the scene, great for scripts that are not attached to an entity. You can create a new audio preset or particle with a selectable model by the following:
RMB: Model/model Default
RMB: Action Editor > in editor choose audio or skyparticle
In the new objects property find the options for loading file.
RMB: Entity - Save As Preset or drag drop in the asset manager.
We do need to add a special type of model to the action such as audio (particle was supposed to have one

)
Hope this helps
