HOW TO CHANGE A REGION NAME
Be careful with this! You might want to make a backup of your whole NWS folder before fiddling with these files!
Shut everything down. Go to your NWS folder, then the apps folder, then OpenSim, then 0002, then bin, then Regions. Open the Regions.ini file in Notepad or another text editor.
You will see something like this:
[Monkey Planet 1]
RegionUUID = 693586c6-2326-4d7d-8d04-a21ca9fb4514
Location = 7005,7017
InternalAddress = 0.0.0.0
InternalPort = 9000
AllowAlternatePorts = False
ExternalHostName = 24.181.235.84
If you only have one region, your Regions.ini file will be short. If you have more than one region, then you'll have several sections like this, one right after another, one for each region. Don't fiddle with the port numbers unless you're running several grids simultaneously, and know how to do port forwarding.
To change the name, just change the first line. From, say, [Monkey Planet 1] to [Welcome Island]. Make sure to keep everything else untouched, including the brackets around the region name.
You can also change the region locations here. Keep in mind that if you have more than one region, they are arranged in a pattern. Be very careful when moving regions not to mess up that pattern. For example, if I decided to move my whole grid from the 7000's to the 4000's I'd just change the first digit of every Location coordinate from a 7 to a 4, keeping the other digits the same, so the 7006 would become 4006, and 7017 would become 4017. That way, the regions will stay in the right relation to one another.,