i have problem with my e720 with songs *.wav

i have a lote of songes have the extention *.wav & my e720 do not play it i want a solution for this or software witch can i download it my mobil can play this file with *.wav
2- i wana a program to make my e720 picture witch i take fullscreen whene i see it after i toke thee pic
& thank alot
ur s hossam