Okay.. Open the file Datapath.cs found in Scripts/Mics..
There you see:
Code:
private static string CustomPath = null";
What you do is, create a folder somewhere.. anywhere you want, below that line there is a list of all the *Required *.mul files that RunUO Has to have to read from, in order to load the shard. So, you need to just copy those files from the Ultima Online folder, and place them in your new "Core" folder. When you build the new folder with the needed mul files, enter that directory in to the line above, as so:
Code:
private static string CustomPath = @"C:/ThisDirectory/CoreFolder";
Obviously, you need it to have your actualy directory, not that one there.
Now, when you start RunUO it will read those files, not the ones in UO folder....
Okay, with that done you now have a new map you created with Dragon, and want to have it usable on the shard. You now need to place the new map and statics files in this new "Core" folder, and in the UO folder, replacing the existing ones. Thats it, you should have trouble free maping now.
With this done also, you can now freeze and melt the statics in game with no problems. You also do not have to reload the RunUO shard to update your Ultima Online folder. Simply freeze an area, and copy the statics files from the Core folder.. replace the static files in the UO folder with them, and log back it

(you must close client in most cases, or any other program that might read the files in the UO folder, as InsideUO etc..)
Good luck