I would also need to modify my BIOS from Windows...
The reason isn't password related : my ps2 port stopped working on my Asus K8V-X MoBo, and unfortunately legacy USB is disabled in the BIOS, hence no pre-Windows input, no safe mode, no getting into BIOS. I tried at least 5 ps2 keyboards old and new none worked so I got an USB one. Now I just need to be able to use it, the way things are now, if Windows break down I can't even reinstall without buying a new MoBo, which is silly. I'd need an utility that would let me enable legacy in the BIOS, I tried taking the battery out, and unfortunately it is off by default. I can't flash a new BIOS either since the utility involves me typing in DOS prompt at reboot.
Someone told me I should look into getting a copy of my BIOS and the proper BIOS modification utility, modify the copied BIOS to provide USB Legacy Support by default, write a custom Autoexec command with the proper switches, and reboot your machine from floppy. 2 things there, one I didn't find any such utility two doesn't rebooting from floppy means I have to type something?
I'm kinda looking hard into that one... If you have any ideas I'd love to hear them...