First thing you should do is select all and then hit the / key on your keypad a few times. After this, select all and scale it out so it resembles what you know the shape should be. However, you should take what PhilC said to heart. Open the file in whatever program you made the crown in and assign each part a material or give each part a seperate name. Then in UVmapper select by group and move the part you want to have a seerate color. Lastly, check out the link that Blackhearted provided to get more ideas on what to do. This should get you started.