Gday Michael
If you read the relevant sections from
http://www.weasner.com/etx/archive/nov11/autostar.html
http://www.weasner.com/etx/archive/dec11/autostar.html
You can see part of the sorry saga as it occurred for other users.
The "damn the torpedoes" mode can be found by looking for "forcehandset" in the pages.
One user recovered OK by a simple reload, the second required the backdoor methods.
When Starpatch 1.803 is started in this mode,
it will warn you that you are trying to crossload firmware,
but will allow you to do do if you really want to.
Soooo, download and install StarPatch
Download the A1F7 firmware from the Starpatch site
and ensure it is in the Starpatch directory.
Start Starpatch and try to update the Hbx by loading A1F7.
Ie forcibly select Audiostar as the Hbx type first.
Starpatch will detect you have 497EP firmware loaded and give warnings, but in forcehandset mode, you can override them.
If it works, you are back in business.
If not, i have the "special little program" but i only release it when i'm happy the victim understands fully what needs to be done.
Andrew