Follow these steps to import into Cadence Allegro V16 & V17:
Simply double-click on the .dra file to open it in Allegro.
Follow these steps to import footprints into Cadence Allegro Versions before V16:
Add files to your padstack path (See How)
Double-click allegro-builder.bat to run the script
First time importing a part from SnapEDA?
Make sure you have completed the first-time setup tasks (See How)