Hey I found this registry edit on this
forum:
Change the application launched by Today screen Soft Keys
To change the application launched by the Today screen Left soft key:
HKCU\Software\Microsoft\Today\Keys\112\Open = "\Windows\Calendar.exe" (REG_SZ string, including quotes)
To change the title of the Left soft key:
HKCU\Software\Microsoft\Today\Keys\112\(Default) = Calendar (REG_SZ string, no quotes)
To change the application launched by the Today screen Right soft key:
HKCU\Software\Microsoft\Today\Keys\113\Open = "\Windows\Calendar.exe" (REG_SZ string, including quotes)
To change the title of the Right soft key:
HKCU\Software\Microsoft\Today\Keys\113\(Default) = "Calendar" (REG_SZ string, no quotes)
Note that 113 normally doesn't exist by default, and probably needs to be created Also note that there is at least 1 application that allows you to set these through a GUI, developed by FdcSoft called SoftKeyAppletEx
I haven't tried it on my Treo. Let us know if it works for you.
Good Luck.
Rockey