6600 user question

heylo guys . just brought the 6600 today. have to admit tht its quiet attractive . just a few questions i wanna ask . (1) i applied the theme on the cell . then changed the wallpaper . now when i apply the theme again , i can get the themes original wallpaper back . even when it asks me "do u want to replace original wallpaper" then to it doesnt come . (2) y cant the phone play wav. file as ringtone??? . it played for 1 sec and then nothing .! (3) how can i control the white balance of the pic? my pics r coming out to white!