I am having a problem with the volume on my Treo 750. I would like to make the volume louder when I am on a call but I have the volume control at the max setting. I came across this link for the older treos: http://mytreo.net/store/product.php?xProd=165

Seems that there has to be a registry key that will "UP" the volume output from it's "stock" settings. Can anyone point me to the Registry key that I could tweak to do this? I just need to make the phone's earpiece louder so I can easier hear the other party while on the phone.