Munku

First and foremost, a question on trasnfering to and from the phone to my computer.

How does one go about transfering images and ringtones to and from the phone? Because I've got a picture on my computer I'd love to use as a background for it, but I have no idea how to transfer it over. Also, ringtones, I'm aware you can get ringtones online, but how does one transfer those to the phone also?

Last thing, in my box, there was a plastic credit card sized thingy, that had 2 barcodes on it, and a cutout, that looks just like an SD card for a digital camera.. Any ideas what this is/was?

Thanks for all the feedback!