1. You need to find the object in dbo.ItemResource or the NPC in dbo.NPCResource in your Arcadia database tables.
2. Find the string reference numbers for the item_name or NPC_name I forget exactly the column heading names without my database tables in front of me, but you will understand when you are looking at the tables.
3. Find and edit the string entries in Arcadia.dbo.StringResource, you can edit right in the table or you can write an SQL query to edit them.
4. Use a nice RDB editor like glandu2's new RDB editor with tabs, you can find this in the collection of tools sticky thread in the sticky section at the top of the forums.
5. Read the table you edited in the database, and write a new RDB for the clients resource folder.
6. Hash the name of the file according to your launch arguments Locale: ASCII or Locale: Windows-xxxx codepages have different encryption hashes.
For understanding client resourcing only... not for the tools listed in the thread as it is very old... the following topic would be of interest to you...
For NPCs sometimes you can find their scripts that run in the .lua files in the scripts folder / resource folder in the game server folder and edit their name directly in the lua file.
If you change the string reference number to text it will just write the text on the screen instead of referencing and returning the string, but you can not do this with items.