Xiaoli,
I have followed this procedure for updates and ran into problems (see my other message on signed ota updates). For full builds that we will program into our boards with the MfgTool, we need to be able to use our keys and not the test keys. However, when those keys are replaced, each build script will keep asking me to enter the password corresponding to the media, shared, etc., keys. The desired behavior is to replace the test keys with our organization's keys (generated using the above procedure) and not have the build keep asking for those passwords.
Michael Robbeloth