To install emitter libraries, unzip into the "Emitter Libraries" folder of your particleIllusion 3 folder.
All Emitter Library Files
To get all the emitter libraries in one file, download one of the following files depending on which version of particleIllusion you installed. Note that you only need to download this large file one time after installing, or after reinstalling. Then to keep up-to-date you only need to download the new monthly emitter libraries each month. (The "all libraries" ZIP files contain all of the monthly libraries)
The following emitter libraries were created with particleIllusion 2.0 before 3.0 was released, and were organized into "themed" libraries when 3.0 was released. These "themed" libraries are available on the 3.0 CD and in the "all libraries" ZIP file -- although you won't have libraries with the following names, you do have the emitters already.