The ubuntu link was worthless. The intell wiki was slightly more helpful but not really. Apparently there is a huge plethora of pentium 4 chips out there and no clear means of determining which does what in terms a non-intell employee would recognize.
I have a computer pentium 4 dual core with HT in one system that runs 64-bit no problem. I have one another with a pentium 4 dual core with HT in another that won't run 64 bit. The only way I can determine which will run 64 in advance is to take the computer apart, remove the heat sink, read the number, look it up? That's stupid!
I found an easier way, just stick a live thumb-drive with 64-bit LM on it. If it says it needs a 64bit cpu and won't boot, then I need to investigate what cpu can be used to make it so.
You have your way. I have my way. As for the right way, the correct way, and the only way, it does not exist.”
- Friedrich Nietzsche