[pstricks] How to make a minimal PDF image

[Nick Ruiz]

Hello,

I understand that pspicture doesn't work with pdflatex. As a result, I 
need to generate pdf files for each of my pspictures to include in my 
main pdf document via the \includegraphics command. Could someone tell 
me how I can make each of my pspictures as a separate standalone .tex 
document? What can I put in the preamble to make the generated pdf only 
the size of my pspicture?

Thank you,
Nick Ruiz