Move DP7.03 idb to a new installed DP9.01

Hi, is there a white paper or other instruction on how to move a 7.xx idb and config to a new installed  DP9.xx?

I am thinking about write out the idb from old installation  and read it in to the idb on the new installation.

or is the only way just to do a upgrade of the DP7.xx to DP9.xx?

Regards

Niels