How to create upgrade package using iceberg for mac

Question

I have created a installation package for mac os x using iceberg, which was successful and working fine. But i have many version of my application.

So My question is how to make a upgrade package using iceberg?,

During upgrade some of the directories inside the installation directory should be untouched(not to be replaced)

Answer 1

In your installer, leave out the directories which shouldn't be touched and they will be ignored. I've noticed that existing directories and files not targeted with changed/added bits aren't touched.