The PIM applications on the Zoomer were written by Palm Computing. The PIM apps on the OmniGo were written by HP. The data files are not directly compatible.
There is only one way I know to export the data from the Zoomer PIM apps: Intellilink software.
There is only one way I know of so far to import data into the OmniGo apps, and that's with HP's Connectivity Kit.
Steve