I haven't done this myself, but this line might help you out when applied in the correct place, with the proper access-list number of course, and replace the Eva/Boaz with IP info.

access-list 110 permit icmp Eva 192.168.5.0/24 echo-reply
access-list 110 permit icmp Boaz 192.168.5.0/24 echo-reply

from
http://www.oreillynet.com/pub/a/netw...ps.html?page=2