Interfacing via USB using libusb to arduino

Yes I am using an arduino duemilanova with an FDTI chip. Please if you have time explain to me a little regarding what drivers I need to use and what language etc. I am using windows xp.

I was reading the section about interfacing with software Arduino Playground - InterfacingWithSoftware but I ended up with more questions after reading it. I am bit knew to this side of things.

I´d be very grateful if some one could just point me in the right direction. I am more than happy to begin studying something if I know it´s possible to use the method. It´s just that now with my limited knowledge I find it difficult to get stuck into a certain topic when I don´t understand the basics of it.