How would i find a lost cat?

Ok so a week ago june 21 2011, (skip to the bottom if you are lazy and want to get to the point)my cat DooDoo who is 1 year old and is a siamese lynx cat male(neutered) and he escaped late at night and i have done a lot of research on how to find my cat but i haven't had any luck finding him. he is non timid so he probably went far but he has come back last time he got out. he also chases other cats and hunts in forests far from our house. now this time he got out at night so i was wondering since we are sorounded by HUGE forests and fields, were he would have gone? we looked and yelled EVERYWHERE! we put flyers everywhere and we have only got one call about a dead cat simalar to our cat but he was found almost 10 miles away from our house. is it possible for a cat to go that far? let me remind you he is not afraid of anything, not even cars. also would he re-home himself after a week? PLEASE HELP! hes a major part of our family. we also have 2 outside cats that CANNOT come inside.