KON-BOOT

Today I stumbled on a piece of hacking software: KON-BOOT by Piotr Bania
I haven' tried it yet but the information on the site is promissing:

Kon-Boot is an prototype piece of software which allows to change contents of a linux kernel (and now Windows kernel also!!!) on the fly (while booting). In the current compilation state it allows to log into a linux system as 'root' user without typing the correct password or to elevate privileges from current user to root. For Windows systems it allows to enter any password protected profile without any knowledge of the password. It was acctually started as silly project of mine, which was born from my never-ending memory problems :) Secondly it was mainly created for Ubuntu, later i have made few add-ons to cover some other linux distributions. Finally, please consider this is my first linux project so far :) Entire Kon-Boot was written in pure x86 assembly, using old grandpa-geezer TASM 4.0.

And the list of tested Windows version is scary:

Tested Windows versions

Windows Server 2008 Standard SP2 (v.275)

Windows Vista Business SP0

Windows Vista Ultimate SP1

Windows Vista Ultimate SP0

Windows Server 2003 Enterprise

Windows XP

Windows XP SP1

Windows XP SP2

Windows XP SP3

Windows 7

Check it out on http://www.piotrbania.com/all/kon-boot/
Also check out his blog: http://blog.piotrbania.com/