These all work:
; Disable Screen Rotate Icon
;---------------------------
[HKEY_LOCAL_MACHINE\SERVICES\SCREENROTATE]
"ShowIcon"=dword:0
; Disable the Comm Manager Icon
; ------------------------------
[HKEY_LOCAL_MACHINE\Services\WirelessMgr]
"Keep"=dword:0
; Disable the Battery Icon
; -----------------------
[HKEY_LOCAL_MACHINE\SERVICES\POWER]
"ShowIcon"=dword:0
; Disable the blinking LEDs (WARNING: also disables vibrate mode)
; --------------------------------------------------------------
[HKEY_LOCAL_MACHINE\DRIVERS\BUILTIN\ALLLEDMGR]
"Index"=dword:0
; Make the date display as one line on the Today screen
; ------------------------------------------
[HKEY_LOCAL_MACHINE\Software\Microsoft\Today]
"AutoSingleLineDatePlugin"=dword:1
; Place all email attachments on Storage Card
; ------------------------------------------
[HKEY_CURRENT_USER\Software\Microsoft\Inbox\Setting s]
"AttsOnCard"=dword:1
<edit>
Not sure why "Settings" is showing a space between the 'g' and the 's'...I've edited the post and verified that there isn't one when I hit save... Weird. So anyway, don't enter a space between the 'g' and the 's' in "Settings"
</edit>