1. Backup your meta file, just in case things go wrong.
2. Open your meta in notepad, you can either right click the meta file and choose open with, or open notepad, and drag the meta file into it.
3. scroll down until your see your first chat command, for example in IBControl it will look like this: ^.*(You|).* (say|says|tells you|think), \"!sum5b\"$
4. highlight and copy ^.*(You|).*
5. click Edit and choose replace, or hotkey ctrl+h
6. paste previous copy into "Find What"
7. paste again into "Replace With" and add your character names into it between the parenthesis, always separated by a |. Example: ^.*(You|charname1|charname2|charname3|etc).*
8. choose replace all, and click file and save.