DSO nano new bootloader firmware

Hello,

Sorry but don’t get it:

I got ver 1.5 with 2 GB SD card.

I take the card out;
power on the DSO in USB mode
screen remains blank
Windows disables the “unknown USB device”
what folder am I going to open when it connects?
where do I drop the files from Alf’s attachment?

This is all meant to provide a workaround for this proplem here http://www.seeedstudio.com/forum/viewtopic.php?f=12&t=3944

Stephan