INSTALL:
- copy emfxClouds.mel and AEfluidEmitterTemplate.mel in C:\Users\*\Documents\maya\201*-x64\scripts
- copy emfx_cloud.bmp emfx_cloud_icone.bmp in C:\Users\*\Documents\maya\201*-x64\prefs\icons
- create a shelf icons that contain the following code :

source emfxClouds.mel;
source AEfluidEmitterTemplate.mel;
emfxCloudsCreateUI();

- set the shelf icons emfx_cloud_icone.bmp manually