Hi,
Step 1:
1A)create a part for the sticker, assemble it on the part.
OR
1B)n.a.
Step 2:
2A)edit the sticker part (1A) or the part on which the logo should be mapped. Format/Style/New : create a new face style, name it logo for example and in the texture tab, import your image (cannot be an eps though... you'll have to convert to a standard image format). After the new face style is created. Apply it on the face or partial face (using a sketch and the split face command) by using Format/Part Painter. Go to VS+ and detach material on that part if anything was already applied to it. By refreshing the presentation image (render), you should see your logo appear.
2B)in VS+, create a material. Using the 'Wrapped filetered image' shader, you will be able to import a standard image file. Then save that material in a personnal archive. Finally apply that material on the appropriate part (face only is not possible though...) by dragging the material on the sticker part for example.
HTH,
Fred