info.yml:
mchat:
    prefix:
        Default: '&f[Guest]'
        Player: '&a[Member]'
        Vip: '&c[Vip]'
        Mods: '&6[Mod]'
        Admins: '&4[Admin]'
    group:
        Default: 'default'
        Player: 'player'
        Vip: 'vip'
        Mods: 'mod'
        Admins: 'admin'
    suffix:
        Default: ''
        Player: ''
        Vip: ''
        Mods: ''
        Admins: ''

__________________

config.yml:
mchat-date-format: HH:mm:ss
mchat-name-format: '+prefix+dname+suffix&e'
mchat-message-format: '<+prefix+dname+suffix&f> +message'
auto-Changed: 1
mchat-playerEvent-format: '+p+dn+s&e'
mchat-join-message: 'has joined the game.'
mchat-leave-message: 'has left the game.'
mchat-kick-message: 'has been kicked from the game.'
mchat-API-only: 'false'


___________
PermissionsBukkit config.yml:

groups:
    default:
        permissions:
            permissions.build: false
            mchat.prefix.Default: true
    player:
        permissions:
            permissions.build: true
            mchat.prefix.Player: true
        worlds:
            creative:
                coolplugin.item: true
        inheritance:
        - default
    vip:
        permissions:
            permissions.build: true
            mchat.prefix.Vip: true
        inheritance:
        - player
    mod:
        permissions:
            permissions.build: true
            mchat.prefix.Mods: true
        inheritance:
        - vip
    admin:
        permissions:
            permissions.build: true
            mchat.prefix.Admins: true