is it possible to configure the Event smodule to not show the time in the start/end date sections? Can this be done without the source? If not, how do I upgrade the install package to the source package?

Oh well. Having a custom time zone/region won't really help if each user has to set it (one setting allowed per user account on Windows) and it messes with other apps. Hmm... back to the drawing board.

You can change the folowing lines in DesktopModules/Events/EventList.ascx:

LINE 17:   <asp:Label id=lblEventBegin Runat="server" text='<%# Format(DataBinder.Eval(Container.DataItem,"EventTimeBegin","{0:g}")) %>'>
LINE 25:   <asp:Label id=lblEventEnd text='<%# Format(DataBinder.Eval(Container.DataItem,"EventDateEnd","{0:G}")) %>' Runat="server">

to:

LINE 17:   <asp:Label id=lblEventBegin Runat="server" text='<%# Format(DataBinder.Eval(Container.DataItem,"EventTimeBegin","{0:d}")) %>'>
LINE 25:   <asp:Label id=lblEventEnd text='<%# Format(DataBinder.Eval(Container.DataItem,"EventDateEnd","{0:d}")) %>' Runat="server">

( or simply change {0:g} to {0:d} )

You will probably need to do this (or something similar) each time you upgrade the module.  I tested this in Events 03.03.08.