[pstricks] Include jpg pictures in LaTeX with PSTricks?

[Christos Vlachos]

Hi all,
I'm new to PSTricks and I was wondering if anyone can help me with the  
following. Specifically, does anyone know how I can include a picture  
(say jpg) in LaTeX,
using Pstricks? I know how to do it with the graphics package (i.e.,  
\includegraphics) , but I'm
using Pstricks a lot (i.e., for drawing linguistic trees with pst- 
jtree), so I wouldn't like to use graphics for just this reason.

Thanks beforehand.