I've installed a Promise Ultra IDE card but NT/2000 will no longer work.

A. Although the Promise card is an IDE card Windows NT/Windows 2000treats it as a SCSI card and so the boot.ini file ARC path needs to be changedfrom the multi().../signature() format to scsi().

Note: The new signature() format is used in Windows 2000 for IDE devices, andexample line is:

signature(a1bb)disk(0)rdisk(0)partition(2)WINNT="Windows NT Workstation Version 4.00" 

For example if I had boot.ini file:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)WINNT="Windows NT Workstation Version 4.00" 
multi(0)disk(0)rdisk(0)partition(1)WINNT="Windows NT Workstation Version 4.00 [VGA mode]" /basevideo/sos

and then installed the Promise card (and install the driver before moving theIDE cable from the motherboard to the card), I would change boot.ini to:

[boot loader]
timeout=30
default=scsi(0)disk(0)rdisk(0)partition(1)WINNT
[operating systems]
scsi(0)disk(0)rdisk(0)partition(1)WINNT="Windows NT Workstation Version 4.00" 
scsi(0)disk(0)rdisk(0)partition(1)WINNT="Windows NT Workstation Version 4.00 [VGA mode]" /basevideo/sos

Make sure you also change the "default=" part. Obviously make sureyou have loaded the Promise driver before trying to boot (Windows 2000 as ofbuild 2114 has build in support).