About Travelling in Chad
Chad Travel Info - Intro to travel to Chad
http://www.lonelyplanet.com/destinations/africa/chad/

Chad Visa Reqirements
Chad visa info - infro about getting visa for Chad.
http://www.traveldocs.com/td/index.htm

Map of Chad
Good and detailed map of Chad
http://www.lib.utexas.edu/maps/africa/cameroon_pol98.jpg