Is There a Way to Create/Edit APN?

[mel2000]

Rooted VS920 4.0.4/ICS. Tried using OfflineSim APN app but couldn't get it to create a new APN. Also tried method of adding two lines to Build.prop but that didn't work either. I was able to delete the default APN but the Mobile Networks option was disabled when I tried to create a fresh APN. I used APN Backup & Restore to successfully restore default APN. Is there any root app that can can create a new APN or change the old one? Thanks.