"It took a few tries to find where to set the ringtone. It is assigned from the phone application while the rest of the MDA's sound effects (including the new message alerts) are adjusted in the system settings."
Not quite. You can set the default ringtone in the system settings, as well.
BTW, PPC Profiles Pro is a free app that lets you set profiles, including ringtones, alerts, BT & flight settings, etc. Very easy to use. Find it here at http://www.modaco.com/PPCProfiles-Pro-f151.ht ml
That software caused too many bugs in my MDA. Instead, I just created a "My Documents" folder on my storage card, and windows will automatically populate those ringtones in its sounds list. This way you dont take up the device's storage memory/ram.