Does anyone know how to change the sounds for OZ Instant Messenger?

[ScrapMaker]

I can hardly hear when I get a new message. I was hoping that maybe someone had found out how to change this. I also wish I could make it vibrate, but this only works when the phone is in vibrate-only mode.

This is on a Sprint Vogue, but I believe OZ Instant Messenger is on a good number of phones/carriers.

I have combed through the registry, looking for settings, but it looks like I'll have to add my own key if I want to change something.

Any ideas?

Thanks,

Steve