Hello I have a cisco router, CISCO C828 (with non-working web-interface im sure this would be so much easier with that)

And i was hoping some one could give me a quick point in the right direction, i have about 10 nat rules, that i need to change the IP on, since i bought another machine and now want that particular port to point to the new machine instead of the old one

So im looking to do the following

ip nat inside source list 101 interface Dialer0 overload
ip nat inside source static tcp 192.168.1.10 1723 interface Dialer0 1723
ip nat inside source static tcp 192.168.1.10 443 interface Dialer0 443
ip nat inside source static tcp 192.168.1.10 79 interface Dialer0 79
ip nat inside source static tcp 192.168.1.10 6543 interface Dialer0 6543
ip nat inside source static tcp 192.168.1.10 110 interface Dialer0 110
ip nat inside source static tcp 192.168.1.10 25 interface Dialer0 25
ip nat inside source static tcp 192.168.1.10 80 interface Dialer0 80
ip nat inside source static tcp 192.168.1.1 23 interface Dialer0 23023
ip nat inside source static tcp 192.168.1.10 21 interface Dialer0 21
ip nat inside source static tcp 192.168.1.11 88 interface Dialer0 88
ip nat inside source static tcp 192.168.1.11 1234 interface Dialer0 1234
ip nat inside source static tcp 192.168.1.10 20 interface Dialer0 20

into
ip nat inside source list 101 interface Dialer0 overload
ip nat inside source static tcp 192.168.1.13 1723 interface Dialer0 1723
ip nat inside source static tcp 192.168.1.13 443 interface Dialer0 443
ip nat inside source static tcp 192.168.1.13 79 interface Dialer0 79
ip nat inside source static tcp 192.168.1.13 6543 interface Dialer0 6543
ip nat inside source static tcp 192.168.1.13 110 interface Dialer0 110
ip nat inside source static tcp 192.168.1.13 25 interface Dialer0 25
ip nat inside source static tcp 192.168.1.13 80 interface Dialer0 80
ip nat inside source static tcp 192.168.1.1 23 interface Dialer0 23023
ip nat inside source static tcp 192.168.1.13 21 interface Dialer0 21
ip nat inside source static tcp 192.168.1.11 88 interface Dialer0 88
ip nat inside source static tcp 192.168.1.11 1234 interface Dialer0 1234
ip nat inside source static tcp 192.168.1.13 20 interface Dialer0 20

in my attemps to do this, i am frequently told the following:

Static entry in use, cannot change.

And this is all fine and dandy, now i've read that one can disable NAT (this is however, not an option for me, as i wont have access to it anymore). Another option is to block traffic on that port, and this i would like to do, but i cant for the life of me figure out how to block on this cisco.

and i have yet to find anyway of doing this

Any help is appreciated. thanks