Open Xterminal
become root by typing:
go to the directory, where the cofiguration is stored:
you will change the rx-51 file. But first it's better to make a backup of the original file. So type:
ok. Now if you do
you will see that you have also the backup file in the directory. Let's change the file using vi (or vim, if installed - the commands are the same):
the file is now opened in the Xterminal. Use the up/down keys or PgUp/PgDn on the screen to find the part of the file you are looking for.
Press i (just the letter i) and now you can Insert some text in the file. When you have modyfied what you needed type: Esc (on the screen) and
(that means: esc - exit from instert mode, : - begin a vi command, w - write to file (save), q - quit and back to command line).
More useful vi commands:
- just quit
- quit without save

Remember to do backups of the files you are changing, if you are not secure.