Here is a list of common application and user paths:
Server Modules
PHP
/usr/bin/php
MySQL
/var/lib/mysql
Sendmail
/usr/bin/sendmail
ImageMagick
/usr/local/bin/convert or /usr/bin/convert
Perl
/usr/bin/perl
Zend Optimizer
/usr/local/Zend
Pear
/usr/bin/pear
Python
/usr/bin/python
GD2 library
/usr/lib
GD2 include directory
/usr/include
User Directories
Document Root
/home/username
WWW Directory
/home/username/public_html
CGI Directory
/home/username/public_html/cgi-bin
FTP directory
/public_html/ (or just leave blank)