Hello I need to place an extra phone jack for the computer. I want to use Cat-5 since I cannot get a hold of any Cat-3. I don't know which colors to use blue/w just blue both to do the connection from the main old time connection box in the basement to the phone jack. Any advice in how to choose the colors and if I should go with just the standard phone wiring? I will not get a second line in the future and trying to get better speed. I also heards of if I had Cat-3 to connect Red & Yellow to Red & Black & Green to Green for better speed. Will this speed things up since it is doubled? What to do?