Sorry for the massive delay, summer didn't help.
Here you go:
Code:
<ImageStyle Name="exp16_dun_chelsith_prelude" displayname="Deep Chelsith: Vault of Omens [heroic]" zonerect="-1793.00, -1380.00, 931.00, 664.00">
<ImageFrame Source="images/maps/map_exp16_dun_chelsith_prelude.dds" SourceRect="0,0,800,600" />
</ImageStyle>
<ImageStyle Name="exp16_dun_chelsith_prelude_solo" displayname="Deep Chelsith: Vault of Omens [Solo]" zonerect="-1793.00, -1380.00, 931.00, 664.00">
<ImageFrame Source="images/maps/map_exp16_dun_chelsith_prelude.dds" SourceRect="0,0,800,600" />
</ImageStyle>
(I tested it, it works and I pre-added the PoI on my computer)