booting from new hard drive

awhile back I added a hard disk as primary 1 (NTFS,
partition D) and installed XP on it. My original hard
disk is primary 0 (Fat32, partition C) with ME on it.
Both disks are set to cable select. The original disk
is the system partition, and the new disk is a boot
partition. So when I boot with both disks with cable
attached everything is fine, I get the OS select screen,
all okay.

I would like to now remove the old disk (primary 0,
FAT32, system partition C) and just boot directly from
the new disk. However when I detach the old disk I get
the message that hard disk 0 not found, F1 to retry, F2
for setup.

I assume the problem is that the system partition is
still on the old disk (boot.ini, ??, etc) and that
somehow I must transfer this to the new disk for
everything to work okay.

I've tried detaching the old disk and attaching the new
disk to the end of the cable (primary 0), but still same
message & no luck.

I've also tried copying
boot.ini,ntdetect.com,ntldr,bootsect.dos,ntbootdd.sys
from the old hard drive to the new hard drive. Still no
luck, even with the new hard drive connected by itself to
primary 0. I've tried modifiying the boot.ini file to
reflect disk(0), and still no luck.

Any ideas on how to accomplish this? I would like to re-
format the old disk to NTFS & use as file storage.

thanks for help !!!