Ballads of Zimara maps

[benjcallaghan]

Zone rect info for the 3 overland zones, which we can hopefully reuse:

• Splendor Sky Aerie, exp20_rgn_hooluk, -1295.00, -464.00, 1217.00, 1424.00
• Zimara Breadth, exp20_rgn_zimara_breadth, -1581.00, -1186.00, 1563.00, 1167.00
• Aether Wroughtlands, exp20_rgn_aether_wroughtlands, -1494.00, -1137.00, 1464.00, 1082.00

Is there some magic XML we can write to attach the dungeons to the existing in-game maps? Or do we need to create a new .DDS based on the existing maps?