The ZIP file delivered by Cadenas contains an additional ZIP archive. In this embedded archive there are all files required by Smart Plant to run the symbols correctly. Extract the files in the embedded ZIP archive to a temporary folder of your choice.
|/Cadenas/BMP:||Technical 2D Preview Bitmaps for SmartPlant|
|/Cadenas/PS3:||Model Data in Cadenas Export Format|
|/Cadenas/SAT:||SmartPlant Geometry Data Files|
|/Cadenas/XLS:||SmartPlant Reference Data Sheets|
|/Custom Symbols:||SmartPlant Symbol DLL|