files for NT dual boot?

You can only have one primary partition, but the partitions will need to be set to active when installing the other OS.

The files you're going to be needing is NTLDR and boot.ini. If you're went the route of installing NT first and then the other 2nd, you'll be better off running NT setup again, and using the repair option to create those entries for you

Mark

If you have one OS that exist on C: and the other OS on D: their should be a boot manager that gives you a certian amount of seconds to choose the OS.
To change how the systems are listed at startup,open winnt and click start,settings,control panel,double-click the System icon,click on the startup button and then click the arrow next to box to select the order of OS.
The Boot Manager gives you the dual boot options

Apperntly you donot have the configuration for a dual boot setup properly
What operating system versions are you using,WINNT 4 cannot read a fat 32 file partition
Insert a Win98 startup disk in the floppy drive,boot computer
At command prompt type FDSIK
When the Window opens
Select option four to view the drive information
Check to see if the drives are listed,press ESC
Did you partition or foramt the D: drive with a fat 32 partition,if so this is why the NT OS is not showing up as a dual boot setup.
Go to the following Microsoft knowledgebase and look up the Dualbooting

Still not quite sure if these are the files,but here they are
Ntldr Root of startup disk
Boot.ini
Bootsect.dos
Ntdetect.com