How to upgrade WM6 Rom under Vista x64? plz help!

[LordDeath]

hello,

with this guide (http://forum.xda-developers.com/showthread.php?p=1337601#post1337601) i have managed to downgrade my prophet to the NVID rom.
the flashed worked well and now i am at the "tap the screen" step from the newly flashed aku2.2 rom.
now i should install the wm6 rom and i downloaded the PDAVIET 4.0.0.0.3.
i started the "upgrade_rom.bat" and i get several error messages, about that the software is not compatible with a 64bit windows.

what can i do now? can't i flash an other rom on my device? please help me.

edit: it seems like the sleep4.exe is not compatible :(

[LordDeath]

now i tried it with windows xp via vmware:

it updates to the aku2.2 until the point, where i should stick for a while with 80%. then it displays an error message and i tried it again. same thing.

so i flashed the nvid aku2.2 over vista x64 without a problem, i disconnected the device, open up vmware with windows xp and connected the device here.

i started the upgrade_rom.bat from pdaviet 4.0.0.0.3 and it clears and copys the new extension rom.
the it will write the crossbow OS rom, then the following error appears:
could not update itsutils.dll to the current version.

then the flashing stops. what can i do now?

edit:
now i tried it with active sync 4.2 (not 4.5) but i still can't even flash the nvid rom on my xp. at 80% it gives me the error 302