Customize your right-click menu on your desktop by adding custom commands in vista

[Computer_Freak]

BACKUP Your registry prior to making any registry changes. Registry changes can be fatal to your operating system if you do not know what your doing.
Follow these steps:

• Open Run window by holding the Win Key + R or Click Start button
• Then type regedit to open Registry Editor
• Browse to this location by expanding the folders in regedit:

  HKEY_CLASSES_ROOT\Directory\Background\shell\

• Right-click on the shell folder and choose New => Key and name it as you want
• Now right-click on the new Key
• Again choose New => Key and name this key to be command.
• On the right pane you will see Name (Default) and Type REG_SZ. String and for the Value change
• Change value data as Given Below*

*Value data to be added in command key:

Computer Management:
CompMgmtLauncher.exe

Bluetooth Settings: (unverified)
bthudtask.exe

Character Map:
charmap.exe

Cleanup Manager:
cleanmgr.exe

Command line:
cmd.exe

Defragmenter:
dfrgui.exe

Magnifier:
Magnify.exe

Management Console:
mmc.exe

[Computer_Freak]

List of some more commands:

Eject Drive or Safely Remove Hardware
RunDll32.exe shell32.dll,Control_RunDLL hotplug.dll

Open Sound Options:
RunDll32.exe shell32.dll,Control_RunDLL mmsys.cpl

Open Power Profiles:
RunDll32.exe shell32.dll,Control_RunDLL powercfg.cpl

Open Add/Remove Programs:
RunDll32.exe shell32.dll,Control_RunDLL appwiz.cpl

Safely Remove Hardware:
RunDll32.exe shell32.dll,Control_RunDLL hotplug.dll

Open System Properties:
RunDll32.exe shell32.dll,Control_RunDLL sysdm.cpl

Open Network Connections:
RunDll32.exe shell32.dll,Control_RunDLL ncpa.cpl

Task Manager:
taskmgr.exe

Wordpad:
write.exe

Notepad:
notepad.exe

Launch Narrator:
Narrator.exe

Microsoft Configuration Utility (msconfig)
msconfig.exe

MS Paint:
mspaint.exe

[need Tos]

Thank you so much for this nice information. Check these threads for some interesting stuff:
Adding rename option to right click menu of the Recycle Bin
Keyboard commands for Right-Click