audio system

Im looking to get new speakers in my 2001 jetta, it doesnt have the monsoon sound system. I need to know if the stock amp will be able to handle the speakers that i would like to purchase. http://www.crutchfield.com/p_2064CS674/Kicker-40CS674.html?tp=94

can anyone help with this,it just wont go into aux mode. plus my car didnt come with a manual.do anyone know how i can get this manual on here thanks in advance

I have the stock single din monsoon radio in my 2000 jetta and wanted to upgrade to the double din premium (with a cd player)out of an 04 jetta...I was wondering if it would work/fit....Any info would help thanks