How do I put music on my new LG Xenon memory card?

I just got the new LG Xenon-- love it!

I have a memory card and i have put some music on it already, but my music is limited. How do I get the music from my Itunes straight to my memory card?

So far i have but in my memory card to my computer, but i do not know how to get music from itunes. I go to Start, then Music, then Itunes, then Itunes Music, but not all of my music is on there?How do I put music on my new LG Xenon memory card?
I just saw this phone today and decided I"m getting it:D It's so cute! Anyways, the lady working at RadioShack said that she knows for a fact Itunes puts locks on their music. So you have to use it for you iPods only. So it can't be put on your phone from iTunes. BUT she did say if you burned your Itunes songs onto CDs, you could put the songs on your computer from your CD and it could POSSIBLY work. I'm pretty sure it would, because I've put iTunes music on CDs so if my computer breaks I have my songs. And I've put my songs on my computer from the CDs. Hope it works(: And if you try it, could you post in your best answer comment section or under added details if it worked? Because I'd like to know too. Thanks(: