ok i have a pentium 4 extreme edition at 3.2ghz socket 478 i found they make core 2 duo mobile socket 478 processors i got the latest bios in my alienware would it support the core 2 duo the pins are exactly the same.
That Pentium 4 is a desktop processor in the desktop 478 socket. The Core 2 Duo is a mobile processor in the mobile socket known as Micro-FCPGA... which happens to have 478 pins. They're not compatible afaik. If you want to be extra sure call Alienware support and ask them about it, but I don't think you can upgrade the processor in that laptop.
Time to buy a new notebook if you need a better processor.