hi guys... i think there already is a thread about how to hook an amp to factory deck but i didnt really understand that i have corolla 2003 and i am planning to install system in it (without changing the deck... since i do not have rca ports some one told me to get rca inverter or Line converter ... so my question is that how complicated is it to install the whole thing.. also if any one have ne suggestions or comments or any webpages links that can provide instructions plz leave a msg here thank you...