I'll have to look for it. I didn't save the link.
I'll get back to you..............
EDIT:
This may be what I did. It's been awhile, and I don't remember. I copied and pasted the info below, from Nero's site:
For OEM bundles, such as Yamaha, TDK, Memorex, Lite-On, etc. you do not need a serial number, as it is embedded and will install automatically. After a successful installation, you can find your serial number located in your registry.
Follow the steps below in order to locate it:
1) Click on ´Start --> Run´ and type in ´REGEDIT´.
2) Click on ´OK´, which opens the Registry Editor.
3) Click on the folders ´HKEY_LOCAL_MACHINE --> SOFTWARE --> AHEAD --> NERO BURNING-ROM --> INFO´.
4) You will see your serial number on the right-hand side of the Registry Editor, with following name (related to the respective version you have): Serial4, Serial5 or Serial6
This entry looks as follows:
14xx-xxxx-xxxx-xxxx-xxxx (for Nero 4)
15xx-xxxx-xxxx-xxxx-xxxx-xxxx (for Nero 5)
1Axx-xxxx-xxxx-xxxx-xxxx-xxxx (for Nero 6 Ultra Edition)
Please note the number.
The download is here:
http://www.nero.com//enu/Upgrade_InfoPage.php