How to block specific traffic in Cisco 871 routers?

Hi all,
I have several Cisco 871 routers across the country and need to block torrent traffic on all of them. I used to do that in Cisco 1812 some months ago but I can not find such predefined policies in the 871. Can you help me out please?

P.S.
Preffer to do it trough SDM 🙂

EDIT:
Or atleast point me to creating/importing predefined policies for P2P applications in the Firewall/ACL configuration.