Sometimes transplants work. Sometimes they don't.
Does it get past POST? Does Windows start and then reboot? Are you able to run in safe mode? Do you realize that your 32-bit OS will probably not see all of the 4GB? That it may only see 1GB? Or 2? But probably not 4? Hm? What kind of video card is installed on the 64-bit machine? Is it by any chance a... 64-bit card? Maybe even integrated graphics? 64-bit integrated graphics? That your 32-bit Windows XP is trying to use with 32-bit drivers? Not to mention all the other drivers? Do you see what I'm getting at? Hm? Do you? Do you know that only dogs can hear me now?
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32-bit XP will have no problem running on a 64-bit machine, but it has to be installed on that machine. What you're doing is attempting a transplant. Frankly, you'd be lucky if you could successfully transplant ANY Windows OS, even from one 32-bit to another 32-bit machine of the same manufacturer. Windows does not like to be transplanted.
Well, anything after Win98, that is.
If you can get to Safe Mode, you might have a chance. If you have an XP installation disk, you can try repairing XP on the new machine. But it's probably a waste of your time.
Windows 7 isn't all that expensive.
Linux is free.