Worked for me, will hopefully work for others too
Code:
<ImageStyle Name="exp05_dun_najena_forge" displayname="The Deep Forge" menugroup="Lavastorm (Island)" zonerect="-137, -265, 139, 55">
<ImageFrame Source="images/maps/map_exp05_dun_najena_forge.dds" SourceRect="0,0,436,506" />
</ImageStyle>