Hi Walter,
There are two ways to get Device Manager.
(1)Install DCNM and DM will also be installed.
(2)Point your browser at the IP address of the switch and download it from there. Then run the "jxpiinstall.exe" file to install DM. However, to install it from here, you must have Java 1.5 and 1.6 or you will just get a "Certificate Revoked" message.
Best regards,
Jim