Helpppp!? I am going to buy a 2 gb (or maybe 1 gb) micro sd memory card for my blackberry pearl. i want to put music on it.

in order to take music off my computer and put it on my phone do i need a USB cable cord OR a card reader OR both?
i am NOT taking the songs from iTunes. i have some downloaded music on my computer and i just want to use that.


THANKSS