Corrected zonerect. I apologize for the multiple updates.
Code:
<ImageStyle Name="exp06_dun_vastydeep01" displayname="Vasty Deep: The Conservatory" menugroup="Odus" zonerect="-423, -262, 86, 127">
<ImageFrame Source="images/maps/map_exp06_dun_vastydeep01.dds" SourceRect="0,0,672,512" />
</ImageStyle>