[Windows Mobile] Farmer Ted:
Do it with a reg file like this:

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today]
"HidePluginSeparators"=dword:00000001
"AutoSingleLineDatePlugin"=dword:00000000
"Date"=dword:00000000
[COLOR="SeaGreen"]"Enabled"=dword:00000001[/COLOR]

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items]

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"ElecontDialer"]
"Order"=dword:00000005
"Enabled"=dword:00000001
"DLL"="\\Windows\\ElecontDialerPlugin.dll"
"Selectability"=dword:00000002
"Options"=dword:00000000
"Type"=dword:00000004

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\Windows Live]
"Order"=dword:00000011
"Type"=dword:00000000
"Enabled"=dword:00000000
"Dll"="WLMTodayScreen.dll"
"Selectability"=dword:00000002
"Options"=dword:00000000
"XMLFile"="res:WLMDeckCode:201"
"Height"=dword:00000032
"Transparency"=dword:00000001
"MenuBarDll"=""
"MenuBarID"=dword:00000000
"Flags"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Wireless"]
"Order"=dword:0000000f
"Enabled"=dword:00000000
"Options"=dword:00000000
"Flags"=dword:00000000
"DLL"="netui.dll"
"Type"=dword:00000004

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Internet Calling"]
"Order"=dword:00000009
"Options"=dword:00000000
"Flags"=dword:00000000
"Enabled"=dword:00000000
"Selectability"=dword:00000002
"DLL"="voipphonecanvas.dll"
"Type"=dword:00000004

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Messaging"]
"Enabled"=dword:00000000
"Order"=dword:0000000b
"Options"=dword:00000000
"Flags"=dword:00000000
"Selectability"=dword:00000002
"DLL"="tmailutl.dll"
"Type"=dword:00000004

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Tasks"]
"Enabled"=dword:00000000
"Order"=dword:00000008
"Flags"=dword:00000001
"Selectability"=dword:00000001
"Type"=dword:00000003

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Calendar"]
"Order"=dword:0000000a
"Enabled"=dword:00000001
"Flags"=dword:00000003
"Selectability"=dword:00000001
"Type"=dword:00000001

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Device Lock"]
"Order"=dword:0000000e
"Options"=dword:00000000
"Flags"=dword:00000000
"Enabled"=dword:00000000
"Selectability"=dword:00000002
"DLL"="shutil.dll"
"Type"=dword:00000004

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\Windows Live Search]
"Order"=dword:0000000c
"Enabled"=dword:00000000
"Dll"="WLMTodayScreen.dll"
"Type"=dword:00000004
"Selectability"=dword:00000002
"Options"=dword:00000000
"XMLFile"="res:WLMDeckCode:207"
"Height"=dword:0000000f
"Transparency"=dword:00000000
"MenuBarDll"="WLMHSSearchBarResources"
"MenuBarID"=dword:0000012c
"Flags"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\Skyfire]
"Order"=dword:00000004
"Enabled"=dword:00000000
"Type"=dword:00000004
"Selectability"=dword:00000002
"Options"=dword:00000000
"Flags"=dword:00000000
"DLL"="\\Windows\\SkyfireHomeScreen.dll"

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\SKSchema]
"Order"=dword:00000012
"DLL"="\\windows\\SKSchemat.dll"
"Options"=dword:00000000
"Selectability"=dword:00000001
"Type"=dword:00000004
"Flags"=dword:00000000
"Settings"=hex:00,00,00,00,09,00,00,00,00,00,00,00,01,00,00,00,1e,00,00,00,01,\
00,00,00,02,00,00,00,00,00,00,00
"Enabled"=dword:00000001

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\TodayNotes]
"Enabled"=dword:00000001
"Order"=dword:00000010
"DLL"="\\Windows\\TodayNotes.dll"
"Options"=dword:00000001
"Selectability"=dword:00000002
"Type"=dword:00000004
"Flags"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\PDAStatus]
"Order"=dword:00000014
"Flags"=dword:00000000
"Type"=dword:00000004
"Selectability"=dword:00000002
"Options"=dword:00000001
"DLL"="\\Windows\\PDAStatusPlugin.dll"
"Enabled"=dword:00000001

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\Pocket Digital Clock]
"Order"=dword:00000003
"Flags"=dword:00000000
"DLL"="\\Windows\\PDC.dll"
"Type"=dword:00000004
"Selectability"=dword:00000002
"Options"=dword:00000001
"Enabled"=dword:00000001

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\"Owner Info"]
"Order"=dword:00000007
"Type"=dword:00000000
"Selectability"=dword:00000001
"Flags"=dword:00000000
"Enabled"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\SKTC]
"Order"=dword:0000000d
"Selectability"=dword:00000002
"Type"=dword:00000004
"Options"=dword:00000000
"Enabled"=dword:00000000
"DLL"="sktc.dll"

[HKEY_LOCAL_MACHINE\Software\Microsoft\Today\Items\TouchFLO 3D]
"Type"=dword:00000000
"Order"=dword:00000002
[COLOR="Red"]"Enabled"=dword:00000000[/COLOR]

Note the last value. If you cook in CHome, then make sure that Items\Default:enabled=0 as well. I don't cook in manila or CHome, but that damn TF3D value keeps getting in there somehow. Also, note that all of the dll's that are called out are located in rom (\windows), and all have been converted to modules. That's the way to cook in a plugin, imo.