In the code that I've seen everyone use:

[HKEY_CLASSES_ROOT\Directory\shell\cmd]
@="Open Command Window Here"
[HKEY_CLASSES_ROOT\Directory\shell\cmd\command]
@="cmd.exe /k \"cd %L\""
[HKEY_CLASSES_ROOT\Drive\shell\cmd]
@="Open Command Window Here"
[HKEY_CLASSES_ROOT\Drive\shell\cmd\command]
@="cmd.exe /k \"cd %L\""

When you try to "open command window here" on a folder with special characters (& or ^ etc.) You get an error (I attached a screen shot). I've fixed it, hopefully, by changing it to this:

[HKEY_CLASSES_ROOT\Directory\shell\cmd]
@="Open Command Window Here"
[HKEY_CLASSES_ROOT\Directory\shell\cmd\command]
@="cmd.exe /k \"cd \"%L\"\""
[HKEY_CLASSES_ROOT\Drive\shell\cmd]
@="Open Command Window Here"
[HKEY_CLASSES_ROOT\Drive\shell\cmd\command]
@="cmd.exe /k \"cd \"%L\"\""

All I did was add \" around %L

cool good tip

Good work! I didn't noticed so far but i tried even w/o the fix i wouldn't get any error just that it wouldn't start command window in that dir but in the parent dir instead.