Open the Make an entry in styles.xml file and include an entry as shown in bold below:
<?xml version="1.0" encoding="utf-8"?>
<styles>
<style>
<label>Default</label>
<swfPath>styles/Oracle.swf</swfPath>
<iconPath>styles/iconProject.swf</iconPath>
</style>
<style>
<label>Oracle</label>
<swfPath>styles/Oracle.swf</swfPath>
<iconPath>styles/iconProject.swf</iconPath>
</style>
<style>
<label>NewSkin</label>
<swfPath>styles/MyNewSkin.swf</swfPath>
<iconPath>styles/iconProject.swf</iconPath>
</style>
</styles>