Bukkit

Is there any way to maunally change the item codes?

I saw a file called items.db in the plugin data, tried opening it with DBBrowser but couldn't really see anything.

Thanks in advance

Well you can edit the codes in the items.db but there is no command to do that, kinda question why that would be necessary in the first place but ok. It's an SQLite database file so you will need to use a program that can open these. IN there you will find an items table with an id column. Ingame the IDs are base62 encoded to be able to fit more IDs on the signs so you need to decode the ID that you want to change (e.g. with this tool) and set it to whatever ID you want (again while respecting the base62 encoding)