Inspiron Zino HD 410 - Incorrect Service Tag in BIOS

I purchased a new Zino HD arround Dec 2010.  Worked great until about 1 minute after the warranty expired then the MB died.  Could not power on/off.  Bought a used THJX5 MB, installed it and the Zino works great again.

Only issue is the Service Tag in the BIOS does not match the Service Tag number on bottom of machine - I know this is not an problem....but

I would like to overwrite the Svc Tag on the used MB to match the original Svc Tag.  Why?  I like tinkering with stuff and it makes it easier to find s/w updates, etc.  My system used to automatically be detected when I searched for updates but not anymore.

Searched the H/W forum found applications "Asset.com" and "SVCTAG.exe" - downloaded them, saved to a bootable CD but they appear to be too old to run with the Zino 410.  I typed in "Asset.com /s xxxxxxx" and crossed my fingers.  Asset.com generates a message along the lines of "Service Tag not supported by this system."

Is there an updated version of these tools that will reset the Service Tag on the Zino?

I am hoping a benevolent Dell employee reads this, takes pity on me, and emails me the tools or a link to the tools.

If, on the other hand, it is not possible to change the Service Tag on the used MB, I would like to know that as well, just because I am curious.

Thanks.