I don't know if you still need an answer but I managed to install the packages. I actually did it according to same person's another post: http://forum.pfsense.org/index.php/topic,47086.0.htmlhttp://forum.pfsense.org/index.php/topic,47086.0.html
But I changed all of the packages according to stephew10's post (I picked all of them from 8.4 release). This are the packages I've installed (by the way I'm using pfSense 2.0.3 too) :
(Install all of the packages in this order.)
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/php52-gd-5.2.17_13.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/t1lib-5.1.2_2%2c1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libX11-1.4.4%2c1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXpm-3.5.9.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libxcb-1.7.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXau-1.0.6.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXdmcp-1.1.0.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libpthread-stubs-0.3_3.tbz
pkg_add -r http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/mysql-server-5.1.68.tbz
pkg_add -r http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/mcrypt-2.6.8_1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/php52-mcrypt-5.2.17_13.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libltdl-2.4.2.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/php52-gd-5.2.17_13.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/t1lib-5.1.2_2%2c1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libX11-1.4.4%2c1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXpm-3.5.9.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libxcb-1.7.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXau-1.0.6.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libXdmcp-1.1.0.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/libpthread-stubs-0.3_3.tbz
pkg_add -r http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/mysql-server-5.1.68.tbz
pkg_add -r http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/mcrypt-2.6.8_1.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/php52-mcrypt-5.2.17_13.tbz
pkg_add -rfi http://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.4-release/All/jpeg-8_4.tbz
(After installing these packages continue from the post above because the touch commands and everything else is the same)
I've added the last pakage myself because ' /etc/rc.php_ini_setup ' said that it was missing.
And also I have came across the exactly same ERROR as you. It was because I tried to use ' /etc/rc.php_ini_setup ' command from the webGUI's command prompt. Don't do it :P It really breaks the pfSense. You can use the webGUI's command prompt for pkg_add and touch commands but when it comes to '/etc/rc.php_ini_setup' use the shell !