I cannot seem to find the hyperthreading option in my Dell bios on my Dimension 4600

I would like to defiantly enable my hyper threading on my Dell Dimension 4600. And I have a pentium 4 processor. I tried looking in my bios when I press my F2 key, it goes into my bios. But I can't seem to find the hyperthreading option. Is it under the CPU information menu? Because I cannot seem to find it at all! My bios screen is from Dell. It is like a grey color. I do not even have the Award bios or the Phoenix bios screen which is blue. But I wish I had that bios screen a lot. I wonder if there is anyway to download it and get it so I can get rid of my other old Dell bios. But I don't think that I can do that. Oh well. So I hit control, alt, delete and the Task Manager comes up. And then I click on the Performance tab. Now here the top box is wide open. And it is not separated by two boxes. But it would be like this if I could figure out on where my hyper threading options are in my bios. Also, I would like to know more about adding more cores instead of 2 to my Pentium 4. So let me know and explain to me on how to do this. I think I can do this by going into Run, and typing in Msconfig. Then I click number of processors or something like that. But I am not really that sure if that is right to me. Because there are many other ways to do this I believe. But I have seen before that some Task Managers have about 8 cpu graphs, and some even have about 16 graphs. Man, that is really cool. I wonder if mine can handle that. Probably not. But maybe up to 2 or even 8 Cpu graphs will show up on my computer. So I would like to know much more about this info. All righty? Now the other thing that I want to know is about the Physical Address Extension and how to enable that. But I think it is only works on 32-bt operating systems. Not on 64-bit systems. But it might work on 64-bit systems. I am not sure about that. So let me know about that please. So this way, I can add more ram to my 512 megabytes. I really want to try out this Physical Address Extension trick and see if my computer can do it. Well anyway, just let me know on how to enable my hyperthreading in my 4600. And also let me know more about the PAE which is the Physical Address Extension trick. But mostly, I would like to know about enabling my hyperthreding and showing more then 2 Cpu graphs in my Task Manager. I just think that I have to download a plugin or a driver to make my hyperthreading option appear in my bios, but I don't have any clue on how to do it. Because I know my computer can do it. Well that's all for now, and get back to me as soon as possible. So thank you very much!