You'd be looking for an i386 folder that has roughly 4090 files in it, most of them with extensions ending in an underscore. May have some other folders as well, the i386 folder on the CD (2KwSP4) has a total of 5404 files and 93 folders.
No way to tell if a file or two is missing though without trying, and at that point you'd be stuck, so you'd want to create an image first that you can restore with if things go wrong.
If you have that i386 folder, you can possibly run winnt32.exe to do a repair install while booted to Win2K.
Might be able to burn that folder to a CD, and use the 4 floppy disks to install, but I've never tried that with just the i386 folder.
The 4 Floppy disk images and the makeboot tool can be downloaded from
bootdisk.com.
You'll want to run
Magical Jelly Bean Keyfinder, or
BelArc Advisor, or
System Information for Windows to get the product key first, as that will be needed.
You might find a Computer Shop that can burn you a disk for not much more than the cost of the blank disk. You'd need to know if your key is for a Retail or OEM disk, and hope they have a copy of the correct version.
Right click My Computer, click Properties.
In the
Registered to: section is a Product ID number
It may start with 51873, the next three numbers/letters tell you what type if disk was used.
If it was an OEM disk those three letters will be
OEM.
270 is Volume License, other numbers are likely Retail, though there may be other VL numbers.
Imaging Software Wikipedia Comparison Chart
Includes links to both free and commercial versions
Free:
Macrium Reflect DriveImage XML
If you have a Seagate HD, you can use this, which is based on Acronis:
Seagate DiscWizard
Commercial:
Acronis True Image DriveImage XML Macrium Reflect Norton Ghost