Cisco 857 e alice business 7 mega

[myemotion]

Savle a tutti, in azienda abbiamo effettuato il cambio di contratto x problemi alla linea abbiamo cambiato linea adsl e ci hanno appioppato al momento il contratto alice business 7 mega.
possediamo un router Cisco 857
che con ip statici era configurato cosi

!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Adsl-router
!
boot-start-marker
boot-end-marker
!
enable secret 5 $password
enable password iet
!
no aaa new-model
!
resource policy
!
!
!
no ip cef
ip name-server 151.99.0.100
!
!
!
!
!
!
!
!
interface Loopback0
ip address xx.xx.xxx.xxx 255.255.255.255
!
interface Loopback1
ip address xx.xx.xx.xx 255.255.255.255
!
interface ATM0
no ip address
ip nat outside
ip virtual-reassembly
shutdown
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0.35 point-to-point
ip unnumbered Loopback1
ip nat outside
ip virtual-reassembly
no snmp trap link-status
pvc 8/35
protocol ip xx.xx.xx.xx broadcast
!
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
ip address 192.168.2.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip route 0.0.0.0 0.0.0.0 ATM0.35
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface Loopback1 overload
ip nat inside source static 192.168.2.2 interface Loopback0
!
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 1 permit 192.168.2.0 0.0.0.255
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
password service
login
!
scheduler max-task-time 5000
end

Leggevo che x usare ip statico che funziona solo con i router bianchi dati da loro bisogna immettere il mac adress con una passwod.
solo che non so come modificare la config.
mi date una mano.
grazie