Pie Chart Help! Slice explosion?

For Pie Charts, I know how to use the function to "explode" (separate) a single slice of the pie....but is there a way to explode multiple slices of the pie together to draw emphasis on them as a group?

Similarly, can you add a border around 2 slices of the pie chart? At the moment, I only know how to do individual borders around single slices.

All this talk about pie is making me hungry! Any help would be much appreciated, thanks!!