I have a mitsubishi montero 2000,and the radio shows code on the display,does anybody knows the codes ??help,?

Go to the parts counter at Mitsubishi and give them your car insurance as prof of ownership and your cars Vin and they will give you the code for $10 and you can put it somewhere safe for next time. It's easy to do, if you can't put it in have a six year old put it in for you, they have a knack for these things.