B2 Spice AD v4 Database Editor
To
help you maintain the library of parts, B2 Spice A/D v4 comes
with a separate Database Editor.
The
Database Editor, pictured below, allows you to add new parts or
edit any existing device.

Access
and edit the guts of any device, from primitive device model properties
to symbols and names.
Assign
PCB packages to any part or edit any assignment. Add your
own PCB package if you can't find what you're looking for.
With
the Database Editor, adding new parts is a simple process consisting
of a few clicks.