mural

Hi, i own a LG 2630 cdma reliance mobile.i used bitpim to xplore the filesystem.i want to change the message tones in my phone.i do not know how to do it as it uses brew.pls tell me the procedure to change the message tones and ringtones.also tell me how to do the same with LG RD2030.i like these phones very much.only thing is that in these phones message tones are not as good as ringtones.i need good message tones in my phones which are far audible. someone please guide