For what reason? The XP system CD is bootable.
It depends on the format of your HDD as to it even being readable if you use a normal Windows 98 type startup disk, as NTFS is not readable by DOS.
Otherwise:
Put a disk in your floppy drive.
Go to My computer, and right click on A:/.
Click on format, and then at the bottom, click Make Boot Disk. Click Format.
However you can't really do a lot from booting XP via the floppy.
It depends on the format of your HDD as to it even being readable if you use a normal Windows 98 type startup disk, as NTFS is not readable by DOS.
Otherwise:
Put a disk in your floppy drive.
Go to My computer, and right click on A:/.
Click on format, and then at the bottom, click Make Boot Disk. Click Format.
However you can't really do a lot from booting XP via the floppy.