Insert your Install3.x disk into the floppy drive
Turn on the computer.
Let it boot from the Install3.x floppy disk.
When it is finished, find HDToolBox on the Install3.x floppy disk.
Go to partition hard drive.
Uncheck any bootable partitions.
Re-arrange your hard drive partitions if you wish (reboot required afterwards).
Click SAVE.
Wait for the computer to reboot (if you re-arranged your partition sizes).
Click on the wanted partition once the Install3.x floppy finishes booting.
Format it.
Next time you reboot without a floppy disk inserted you will go directly to the "Insert Disk" animation and you'll still have a hard drive totally formated and ready for a fresh WB installation (again, done from the Install3.x disk).