I can't take credit for these, but here are a couple tweaks for volume I found over at Howard's forums:
The first is a reg change:
HKEY_CURRENT_USER/CONTROLPANEL/SOUNDCATAGORIES/INCALL = INITVOL - WAS 2, CHANGED IT TO 4.
The second is in a zip file, just unzip, and put anywhere on your device and click on it. I think it is the same tweak made easier to use...here is the post:
http://howardforums.com/showpost.php...&postcount=575
I will add the zip here as well....let me know if it works for you!!