[PyMOL] Create a dummy atom

[ABEL S. 1. <Ste...@ce...>]

Thank you Jason and Troels for your quick response. 

I have an additional question. Now if i want to pass the COM coordinates x, y and z obtained with the COM script  in the pseudoatom pos. For example to use in the script

How i can do that ?

Thank you again for your response.

Stephane