Path to perl and other paths

Path for ImageMagick : /usr/bin/convert or /usr/bin

Path for NetPBM : /usr/lib/

Path to Perl : #!/usr/bin/perl

Path to cURL: /usr/bin/curl

Paths to mailhost, mailpath, sendmail etc:

/usr/sbin/exim
/usr/sbin/sendmail

either one will work.

Python path : /usr/bin/python

Path to PEAR : /usr/bin/pear

You should able to run the python script as a cron. Server does not support python for apache.