I wanted to know if it was possible to use a song from my itunes for example as a ring tone? How do i go about doing this if it is possible? And also do i need a memory card?

If the iTunes song is not protected it's possible to use it as a ringtone.

Yes get a memory card.

Check out cellsea.com. Possibly the tune you want will be found there.

How exactly do I go about downloading it from the website?

Get the program Ringtone Ripper and it will make a ringtone out of any song you have on MP3 or CD. It will also start the tone where ever you want instead of having to accept what someone else thinks it should be. Then it saves the tone to a folder titled My Ringtones and you can transfer it to your phone.

Make your own ringtones with ringtone ripper beta

Go to the website and click on the "Download and Fun" dropdown. Then click on ringtones and search for the tune. If it's there download it to your computer and then copy it on to your memory card. Or you can download it right to your phone.

Or you can use Audacity (google it) and create your own from any mp3. This way you can just cut the part of the song you want for the ringtone. And it is free.

Audacity is the best free mp3 editor out there...once you get the hang of it you won't want anything else! Lol