From the Blender menus select Add - Mesh - Sculpt Mesh.
This will show a dialog where you can choose the sculptie type and alter the number of faces and multires levels. Normally you would only select the type as the default settings are correct. Changing the faces and multires level is provided for advanced techniques of Sculptie making.
You can then move the vertice in edit mode or sculpt mode to create the desired sculptie shape.
Simply select 'Second Life Sculptie' from the "File - Import" menu and choose the sculptie map to import (hint: click filename with middle mouse button to open quickly).
You will be given an options dialog that will let you select the sculptured prim type and the scale (these match the sizes in Second Life®).
The mesh will be imported with 3 multires levels. You can switch between them on the editing panel.
These correspond to the 3 highest levels of detail in Second Life® so you can check how gracefully your sculptie degrades when viewed from a distance.