Hi,
if you ran the dos program from a floppy, it should have created a file with the password you typed in on the floppy. If you run the lock program again (on that or another disk), the file will be overwritten and you are out of luck.
TEAMASSEMBLY is a master password. The normal password to unlock a harddisk is the same you typed in to lock it.
After unlocking a disk with the password, you also have to disable the security. If you don't, it will lock itself again after a power on reset.
The atapwd program does not make the backup on floppy.
Some guys on the web have a paying service to unlock harddisks.
Some of the stock harddisks can be unlocked by reflashing new firmware to the disk. I do believe you loose the disk locking capability after you have done that. So, you can't use it anymore in a softmodded xbox.
I have also seen a tutorial where they made a serial connection to the harddisk and started to hexedit some stuff in it with the hyperterminal program. This is also only possible with one specific type of stock harddisk.
Did you forgot the password you used to lock the disk, or do you simply have problems to unlock it again with the same password?
If you put the disk in your xbox, you probably get a error screen. Does it show a error numbber? What number?
regards.