We added some skins these days . But we haven't upload it for download yet.
Currently the skins could be configurated in web.config only :
<configuration>
...
<cuteChat ... >
<skins defaultFolder="Royale">
<skin text="Normal" folder="Normal"/>
<skin text="Mac Blue" folder="MacBlue"/>
<skin text="Mac White" folder="MacWhite"/>
<skin text="XP Royale" folder="Royale"/>
</skins>
...
We will upload the new skins soon ...