Does anyone know how to output address book to print on PC. The export files are .IPD and I dont know what software recognizes that extension.

.IPD is the backup file generated by the BlackBerry Desktop software. Other than restoring directly to a BlackBerry handheld, there isn't much that you can do to directly interact with these files.

Your best bet may be to synchronize your address book to an external program (ie Outlook) and print from there.

Or ... in the Desktop Software, in the Intellisync tool, under Configure PIM you can set your Address Book to export to a comma delimited ASCII text file.

From there your Address Book can easily be imported to Excel or some other program for formatting and printing.