I worked with HP for three weeks trying to upgrade three xw4400 workstations to Windows XP Pro x64. They have given up, apparently there has always been a problem with their x64 media for this workstation, see:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=3211220&prodTypeId=12454&prodSeriesId=3211220&objectID=c00765159
I had ordered the x64 media from them and it gave me repeatedly errors, so they sent me a new media kit that worked fine except when it finished it was x32. They sent me a third media kit and it gave me the same errors:
When I try to start the install with the HP Restore Plus! I get an error:
.
An unexpected error has occurred and the Restore Plus! Process is unable to continue. The Restore Plus! Process must be restarted. Reboot, I did this twice to no avail.
I have wasted a month on this so far. In the past I have converted several xw4600s and one xw9400 using their media kit with no problem. So I purchased a builders XP pro x64 OEM package from the local computer store and after making a SATA floppy was able to get one computer upgraded to x64, the store only had one copy and is unable to get anymore.
I had to roll one of the xw4400s out as a x32 so only have one more to upgrade. If anyone knows the trick to get the HP x64 media kit for the xw4400 to work, fire away.