Extract files to your preferred path
Extract the .zip file
Start PADS Layout
Select File > Library
Browse to your preferred library from the drop-down menu, or create a new library if you wish
To import the symbol
Select the CAE Decals option
Click Import... and browse to the extracted folder and select the .c library file
To import the footprint
Select the PCB Decals option
Click Import... and browse to the extracted folder and select the .d library file
To import the part
Select the Parts option
Click Import... and browse to the extracted folder and select the .p library file
How to Link a 3D STEP file to a footprint in PADS layout
Import the footprint and part linkage file (*.d and *.p)
Place the footprint on a PCB (Via netlist import or ECO mode)
Open the 3D viewer by going to View > PADS 3D
Right click on the footprint and select Edit Decal
Because the 3D viewer is open, a window will pop up titled 'Align 3D Models.' Under "Parts mapped to selected model" select the part you just added to the board
Click Import and navigate to the STEP file
Adjust alignments as necessary
Go to File > Exit Decal Editor to go back to the board view