I have received some inputs on this, but based on them I believe some clarifications need to be put into this post.
 Dual head is always possible with ATI cards on the laptop. Most IBM/Lenovo Thinkpads don’t ship with ATI (I am one of those lucky few who have ATI on the R51) but with Intel ones.
 I am looking for dual head or even the configuration where the same screen is available on the laptop and projector. I know this is not the classical definition of dual head.