Thank you to all on the list that helped solve the my problem

Problem: Installing NT4 workstation and Win95osr2 as a dual boot machine
from scratch, on a 8.4Gb hard disk divided into 1Gb partitions of FAT16.
NT4 would come up with the error "BOOT RECORD SIGNATURE AA55 NOT FOUND".

Solution: Use FDisk /MBR to regenerate Master Boot Record, create only 1
partition on the disk, install NT4 workstation on that partition, and allow
NT4 workstation to create the other partitions on the disk. Install Win95
afterwards.

This worked for me!

Thanks again