These are the files referenced in my Blog Articles about creating a custom Boot Wizard. The original download from April 2009 has been split into two different downloads. One for MDT 2008 and one for MDT 2010 as they deal slightly different with webservice calls.
Version 4 of the MDT 2010 Download includes the use of an additional Custom Setting to store the collection ID in the MDT Database to "pre-stage" a computer. Have a look at this Blog Post for more information:
for further information.
After downloading this files make sure you adjust at least the SCCM_Bootstrap.ini to your environment. And you have the Deployment Webservice
Some of the original MDT files in the Download for MDT 2010 have been slightly modified. These files are: