Once you have exported the file and saved it to a form of removable media, you can begin importing address book from Outlook 2007. Open Outlook, go to the "File" menu and select Import and Export. The Import and Export Wizard will open. Select Import from Another Program or File and click Next.
Choose the Comma Separated Values (Windows) option and click Next again. Click the Browse button and locate the *.csv file into which you exported your Outlook address book. Select it and click Open. Choose whether you want duplicates allowed, replaced or ignored and click Next.
Map any custom fields if necessary, click OK and then click Finish.