I flashed both images in Win 7 x64 using XP mode (virtual PC).

First flash went without problems - device was attached via USB menu in restore mode + I did remove battery after.

Second flash (eMMC) hanged in command prompt, but proceeded when reattached device that was alredy attached but disconnected at the moment flasher started. Again, USB menu -> attach device, this time in suite mode.

Flasher started imediately.

Dunno if this is right or wrong, but it's working for me. XP mode is SP3 by default.