I'm uber excited... I put in the following code for the xml to test it, and it works beautifully!
<ImageStyle Name="exp05_dun_najena_hollow_0" displayname="Najena's Hollow Tower" menugroup="Lavastorm (Island)" zonerect="-62,-59,64,107" heightmin="-40">
<ImageFrame Source="images/maps/map_exp05_dun_najena_hollow_0.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp05_dun_najena_hollow_1" displayname="Najena's Hollow Tower" menugroup="Lavastorm (Island)" zonerect="-42,-63,253,167" heightmax="-40" heightmin="-150">
<ImageFrame Source="images/maps/map_exp05_dun_najena_hollow_1.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp05_dun_najena_hollow_2" displayname="Najena's Hollow Tower" menugroup="Lavastorm (Island)" zonerect="-73,-210,66,52" heightmax="-150" heightmin="-220">
<ImageFrame Source="images/maps/map_exp05_dun_najena_hollow_2.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp05_dun_najena_hollow_3" displayname="Najena's Hollow Tower" menugroup="Lavastorm (Island)" zonerect="-110,-129,113,131" heightmax="-220" heightmin="-300">
<ImageFrame Source="images/maps/map_exp05_dun_najena_hollow_3.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp05_dun_najena_hollow_4" displayname="Najena's Hollow Tower" menugroup="Lavastorm (Island)" zonerect="-25,-33,101,152" heightmax="-300">
<ImageFrame Source="images/maps/map_exp05_dun_najena_hollow_4.dds" SourceRect="0,0,436,506" />
</ImageStyle>
To save you some headache though, here are the zonerects:
level "0": -62, -59, 64, 107
level "1": -42, -63, 253, 167
level "2": -73, -210, 66, 52
level "3": -110, -129, 113, 131
level "4": -25, -33, 101, 152
the height cutoffs (going down from top to bottom) are:
-40, -150, -220, -300
I've got a page or so of POI's for i as well once it's up and running!