Get MP3 ringers there, easy way

Go to:

http://www.lg.com/au/mobile-phones/all-lg-phones/all-lg-phones.jsp

Find your phone model and select it, click support, click drivers, click download to downloa LG Mobile Support Tool to PC and software.

Install the software, connect your phone to the computer with the data cable come with the phone or with bluetooth byfollowing the instructions.

Once your phone is connected to the computer, you can transfer mp3 files to your phone to use as ringtone.
 
or just use the free program "bitpim" which allows you to directly edit anything on the phone. you can back up or add contacts. you can transfer photos, music, video.