if you have the new mobile device center in vista, it works.

What error?
What radio upgrade util are you using?
Have you tried the steps I posted above?

i was using phoenix's radio upgrade, it works great on my xp, maybe i just have a picky anti-vista unit.

Ok, but what is the error?
Have you tried compatibility mode or putting the phone in bootloader BEFORE you plug it in?
This site may help.
http://www.modaco.com/RUU-Vista-done-u-t252977.html

Thanks everyone. I ended up downgrading back to 3.5 and then adding the radio in, and then putting 6 back on the phone.

Good deal. Did you notice a difference with the upgraded radio unit? It made a huge difference for me.

I've searched and searched, and cannot find the radio upgrade. Could someone please provide a link to where i can get it? Thanks.

Found, and upgraded, while running WM6. I have win xp and it upgraded with no problems. What's the advantage?

I actually just downgraded back to the stock radio. For some reason, the 1.14 will not download weather information withen the HTC 6 button weather plugin.

it sounds to me like someone forgot you MUST kill windows mobile device center before flashing. WMDC can be killed via task manager. downgrade driver. bootloader mode. tada vista does just fine.