I am unsure hwo to reflash my N800. I am trying to reflash my N800 because I downloaded the Vista Theme for it, however, it turned out to be the Vista Theme for N770 (even though it's also for N800). Now, there is no way to uninstall it. Going to "Installed Applications" and trying to uninstall gives me "unable to uninstall vista".

So, how do I go about reflashing my N800 if I have a WINXP computer? Any help appreciated, thanks.