Yes, Hiren's has quite a bit of pirated software on it. I would stay away from it. I tend use the Ultimate Boot CD (UBCD). It has a copy of NTPASSWD built in. I've found that's it's better to set a blank password with these utilities rather then set a different password. I've had that backfire on me. Typically I set a blank password then, boot, login and change the password from within Windows.
One of item to note on the UBCD is PLOP under bootmanagers. It does a great job on old PCs that can't boot from USB. If you've got a machine without a CD you can get Plop from the developer's website http://www.plop.at/en/bootmanager.html and put it on a floppy.