1)  Setup

vi .local_cshrc

<ADD>

setenv IDLUTILS_DIR ~/idl/idlutils
setenv IDLSPEC2D_DIR ~/idl/idlspec2d 
setenv XIDL_DIR ~/idl/xidl  
setenv IDL_PATH +$IDL_DIR\/lib:+$IDL_DIR\/examples:+~/idl:+pro/
  <The last line require IDL_DIR is set properly.  This is your job!>

2) IDLUTILS 

<Grab the cvs distribution from SDSS>
http://spectro.princeton.edu/idlspec2d_install.html

cvs -d :pserver:anonymous@sdsscvs.astro.princeton.edu:/usr/local/cvsroot login
password: <return>

cvs -d :pserver:anonymous@sdsscvs.astro.princeton.edu:/usr/local/cvsroot co idlutils

cd idlutils
bin/evilmake clean   ; Won't work if you didn't set IDLUTILS_DIR
bin/evilmake 


3) IDLSPEC2D


cvs -d :pserver:anonymous@sdsscvs.astro.princeton.edu:/usr/local/cvsroot co idlspec2d

cd idlspec2d
$IDLUTILS_DIR/bin/evilmake clean
$IDLUTILS_DIR/bin/evilmake 


4) XIDL

<Grab the tar ball from here:  http://cvs.ucolick.org/viewcvs.cgi/xmen/>

mv xidl.tar.gz ~/idl/
gtar -zxvf xidl.tar.gz
cd xidl
bin/evilmake clean
bin/evilmake 

5) Run IDL and try  

  IDL> .com x_splot

and 

  IDL> a = djs_median(findgen(100,100),1)