I wrote a script for modifying these values in ADT.
http://pastebin.com/HHic88vT
For using it you also need my ADT template for 010 Editor.
[attachment=0:2amupewr]WoWADT.zip[/attachment:2amupewr]
It is slightly different from the public one, but without it the script will not work.
Any advice as to how to edit this manually? the template worked like a charm but the script did not.
i.e what each height should be set to.