This will show or hide the small icon that let you change your screen orientation:

HKLM\system\GDI\rotation\HideOrientationUI = 0 (Dword)
or a 1 to hide the icon

If that doesn't work, you can try:

HKLM\services\screenrotate = 1 (dword, 0 to hide)

Note that this might not work at all on some devices

In some WM 5 PPCs, GPS control panel is disabled by default. To enable it:

HKEY_LOCAL_MASCHINE\ControlPanel\GPS Settings

Add a DWORD called "Group" and give it the value of "2" (dec) keep theHide key but change the value to 0 and delete the redirect value andsoft reset

Many OEM replace the Backlight and/or Contrast settings applet by their own versions :

Compaq iPaq 3650 :
OEM Backlight applet, same as original but with a Brightness tab foriPaq special purposes. Removed the Contrast applet because contrastsettings are not supported on the iPaq.

Casio EM-500 :
OEM Brightness applet that replace both the original Backlight andContrast. Added the ability to set different brightness values forbattery and external power operations.
Removed "Turn on backlight when a button is pressed or the screen istapped" settings because it is not supported, replaced by the Auto Dimsettings.
Included the contrast in the same applet, the system one does work, buttheir device act at the oposite of what it should (Dark is Light andLight is Dark).

HP Jornada 548 :
OEM Backlight applet, removed the External Power tab the "Turn onbacklight when a button is pressed or the screen is tapped" setting forBattery Power because these settings are not supported.

Now, here is how to restore the Microsoft original applets on anyPocket PC, note that most settings OEM have been hiding with their ownapplet does not work anyway, the OEM applet(s) will still be availablein the Settings.
For the Backlight applet, browse to
HKEY_LOCAL_MACHINE\ControlPanel\Backlight\
Rename the "Redirect" value to "Redirect disabled", you could justdelete it, but renaming it makes it easy to go back to the OEM setting.
For the Contrast applet, do the same with
HKEY_LOCAL_MACHINE\ControlPanel\Contrast

Here is how to reset your call timers, e.g. outgoing so you can monitoryou mintues each month.[HKLM\software\microsoft\shell\cumlativecalltimers\ line_0 ] change"outgoingvoicecurrent" back
to 0

Use SD Card as My Documents folder


Tricky one, searched long and hard for it, finally found it on the xda-developpers forum.

Anyway, here goes:
Open the key
HKLM\System\StorageManager\Profiles\SDMemory
and change the value of the string "Folder" to "My documents