(TeX-add-style-hook "pyrex"
 (lambda ()
    (LaTeX-add-environments
     "listing")
    (TeX-add-symbols
     '("mysubsection" 1)
     '("mysection" 1)
     '("bd" 1)
     '("rd" 1))
    (TeX-run-style-hooks
     "graphicx"
     "pstricks"
     "hyperref"
     "hypertex"
     "fancybox"
     "fullpage"
     "latex2e"
     "art12"
     "article"
     "12pt"
     "landscape"
     "macros")))