Dual-Head: View Second head in window an first head

[Wilhelm]

Hi,

I googled quite a time for a solution but did'nt get one the following 
question:

if I have a dual head, e.g. notebook with LVDS 1280x800 (first head) and 
a beamer with 1024x768 (second head). Now I want to see the contents of 
the second head in a window on the first head. Is this possible?

-- 
Wilhelm