This is by far the best guide into finding them. Click on the 'Video & 3 Star Walkthrough' link to see how to collect the golden droids (some can be tricky)
http://www.angrybirdsnest.com/complete-angry-birds-star-wars...I take no credit for the above guide, full credit angrybirdsnest.com
NOTE: You only need to collect any 5 golden droids (eggs), you don't need to actually complete the droid levels that they are associated with.