using CreateLionUser.pkg to create an hidden user

Hi, I use this package to create an hidden user, but it's not really hidden : - at the firs boot, it appears in the window login, but not after, replace by Other... (is it possible to make Other not appearing ?) - In the System preferences, it appears in Comptes (in French) with the other users. Is it possible to hide it also here ? Thanks for any answer Christian