Thierry stuff (http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=8174.msg196067#msg196067)
Glaves Textures and Converted Meshes (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11142.0)
Hamilton's Meshes (http://onelittlecorner.proboards.com/index.cgi?board=fhdownloads&action=display&thread=6)
Drek's meshes and particles (http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=7990.0)
Check out the links I've provided ye' above. Hopefully they prove to be useful for ye'. Also, good luck on creatin' that map as I assume that's what yer doin' Ms.
In addition, if ye'd like to use floating islands like what's provided in Sky's Rim, then all ye' need to do is type in rockIsland.mesh or rockIsland2.mesh in the Object Maker.