Download From Luyenchuong Free How Can You Download Music From Two Computers Onto The IPhone?

How can you download music from two computers onto the iPhone? - download from luyenchuong free

I tried to download music by clicking the icon library does not work on my iPhone, but it has so that they are in sync to my computer. I want to download the music library on my second computer as well, but you can not be synchronized, because I lose all the original music. Help?