After watching your CCENT video on ACL's last evening I understood you to say that only "Named" ACLs could be edited without having to delete and replace the complete ACL. After reading the statement below from my CCENT book I'm alittle confused. Would you clarify for me please?
Today, modern IOS versions allow CLI users to easily edit both numbered and named ACLs. Cisco first introduced these enhanced ACL editing features in named ACLs only, and slowly added them to numbered ACLs as well.
Odom, Wendell (2013-03-27). Cisco CCENT/CCNA ICND1 100-101 Official Cert Guide (Kindle Locations 13767-13768). Pearson Education. Kindle Edition.