The first step is to generate a script that properly starts the CIAO environment. Hopefully, this will be fairly straightforward based on inspection of the script in xassist/setup_ciao.sh. When XAssist is started with an acis field name (starting with acisf...) the current detector will change to acis and XAssist will attempt to determine the version of CIAO installed. If this works, the setup is probably ok. Here we show the example of analyzing the acis observation of NGC 6500. This example starts an empty directory called ``n6500''. lheasoft is installed in /opt/lheasoft, xassist is installed in /opt/xassist, pimms is installed in /opt/pimms, ximgfit is installed in /opt/ximgfit, and ciao 2.2 is installed in /opt/Ciao2.2. This user's .login file has the lines: setenv PATH "/opt/xassist/scripts:/opt/pimms:/opt/ximgfit/:$PATH"
setenv LHEASOFT /opt/lheasoft/Linux_2.4_i686