Can't remember where that file is to configure something? Here is a list which might help.

/etc/rc.conf

Configuration file for your locale, UTC or localtime, timezone, keymap, console font, option to use colour in startup messages, module blacklist, modules to load on startup, hostname, network interfaces, gateways, network profiles and daemons.

/etc/pacman.conf

Configuration for pacman

/etc/pacman.d (directory)

Contains files which lets you choose mirrors for the core, extra, community, unstable and testing repos

/etc/X11/xorg.conf

Configuration file for the X Window System.

/usr/share/icons (directory)

Contains cursors and icons

/etc/rc.d (directory)

Contains scripts for starting, stopping and restarting various services like alsa, cups, network etc.

/etc/inittab

Choose whether to startup in the console or in X. You can use this to set up your login manager

GUI

A GUI called Arxin has been developed by the Chakra team. You will have to have KDEmod install to use it. See the following page: http://archux.com/page/installing-and-setting-kde-4