byte no longer supported

i am new to micro controllers and i am learning on different things. i am doing a small gps project and i looked for trial codes in this site and i had obtained one( Arduino Playground - GPS). the code given here no longer supports some formats and i have obtained an error saying byte is no longer supported . can someone please clarify me about this as i am a newbie?it could be better if someone could correct this tutorial.

Use Serial.write() instead of Serial.print(aValue, BYTE)