OK, nice.
Try this in User mapstyles:
Code:
<ImageStyle Name="exp17_dun_vastydeep_solo" displayname="Vasty Deep: Toil and Trouble [Solo]" zonerect="-166, -442, 237, 25">
<ImageFrame Source="images/maps/map_exp06_dun_vastydeep02.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp17_dun_vastydeep_easy" displayname="Vasty Deep: Toil and Trouble [Heroic I]" zonerect="-166, -442, 237, 25">
<ImageFrame Source="images/maps/map_exp06_dun_vastydeep02.dds" SourceRect="0,0,436,506" />
</ImageStyle>
<ImageStyle Name="exp17_dun_vastydeep" displayname="Vasty Deep: Toil and Trouble [Heroic II]" zonerect="-166, -442, 237, 25">
<ImageFrame Source="images/maps/map_exp06_dun_vastydeep02.dds" SourceRect="0,0,436,506" />
</ImageStyle>