Diskette drive 0 seek failure

I am working on a Dell (yuk) Dimension 2400. Here is some info.
BIOS, as best I can tell from the chip and Setup. SST 49LF004B (from chip) Ver. A05 (from setup.)
MOBO Intel D865gbf, or Foxconn LS-36, can't get part number from Dell (imagine that)
Chipset 845GV
CPU Celeron 2.4 Ghz

Basically, all I did was put the HDD and CD/DVD recorders from a Dimension 4600 in place of the existing hardware.
It took a few tries with the BIOS to get it to boot, but it booted and was working well.

Then my sis decided she wanted XP PRO instead of the XP Media Center. So I wiped the HDD with killdisk. And from there it all went South.

When I try to install XP PRO I get

Diskette drive 0 seek failure

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I assumed it was looking for a non-existant floppy, so I went into BIOS and made sure that the floppy option was disabled and that CD/DVD was my first boot choice. All my drives show up in setup. Bios also says "Floppy Drive(Not installed), and the Floppy is unchecked. Unfortunately I can't completely remove the Floppy from the boot list.

No beeps on startup, and all diagnostic lights are green. If I let it sit awhile I get

=======TRAP 0000000D - General Protection Fault=======

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Among the severalother things it says on the same screen are

errcode=2BD0 NoCy NoZr IntDis Down TrapDis.

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This seems as if it should be easy, but I cant figure it out. :4-dontkno :sigh: Any help will be greatly appreciated.
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