You need to bypass the user installation process.
During the installation process from Vista the setup asks for the User-Account and password.
At this time you can bypass the installation process.
=> To bypass press STRG+SHITF+F3
After this you get the Desktop under the Administrator-Account with the Sysprep program on front
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.