What are steps to install Windows Vista Ultimate on T400?

[athinkpader]

Hi
Thank you for reading my post
My T400 come with Windows vista home basic edition and I want to install Vista ultimate edition on it.
Can someone let me know steps to do this installation?
Where I should get drivers for vista 64 bit, any specific taks to do before cleaning the T400 hard disk for vista T400 installation.

Thanks

[arlab]

This was the guide I followed: http://forum.notebookreview.com/showthread.php?t=144783