I flashed back to stock and got the required entries. Attached is a CAB that will create the Settings shortcut in slot 3, first icon of second row, of the HTC Start Menu. If you want to change the slot number, modify the entries as per below.
Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\HTC\Manila\ProgramLauncher\3]
"Command"="--switchtopage Manila://settings.page"
"Path"="\\Windows\\manila.exe"
"IsReadOnly"=dword:00000000
"IconPath"="\\windows\\HTC\\Assets\\Images\\programlauncher\\Program_icon\\settings_88.qtc"
"DispName"="[[IDS_SETTINGSTITLE]]"
Soft-reset required after running the cab.