I'm always a little weary about posts like this. If your going to just install Windows anyway, what do you need the password for? Just format to a Fat system and install your OS.
Do a search in Yahoo! for "retreive lost password in Linux". I'm sure there are many pay products that will do the job.
the problem is if you can't pass the password to boot then you can't load a new operating system to reformatt..once it asked for pass word thats as far as it would go loading..