Thanks, come to find out all i had to do was replace the registry value "IconPath" with data below, thank you for rapid response
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HKLM\Software\HTC\Manila\ProgramLauncher\0 (Button1)
REG_SZ> Command >> --switchtopage Manila://home.page
REG_SZ> DispName >> [[IDS_HOMETITLE]]
REG_SZ> IconPath >> \windows\HTC\Assets\Images\programlauncher\Program _icon\home_88.qtc
REG_DWORD> IsReadOnly >> 1
REG_SZ> Path >> \Windows\manila.exe
HKLM\Software\HTC\Manila\ProgramLauncher\1 (Button2)
REG_SZ> Command >> --switchtopage Manila://people.page
REG_SZ> DispName >> [[IDS_FAVORITEPEOPLETITLE]]
REG_SZ> IconPath >> \windows\HTC\Assets\Images\programlauncher\Program _icon\people_88.qtc
REG_DWORD> IsReadOnly >> 1
REG_SZ> Path >> \Windows\manila.exe
HKLM\Software\HTC\Manila\ProgramLauncher\2 (Button3)
REG_SZ> Command >> --switchtopage Manila://calendar.page
REG_SZ> DispName >> [[IDS_CALENDAR]]
REG_SZ> IconPath >> \windows\HTC\Assets\Images\programlauncher\Program _icon\calendar_88.qtc
REG_DWORD> IsReadOnly >> 1
REG_SZ> Path >> \Windows\manila.exe
HKLM\Software\HTC\Manila\ProgramLauncher\3 (Button4)
REG_SZ> Command >> --switchtopage Manila://settings.page
REG_SZ> DispName >> [[IDS_SETTINGSTITLE]]
REG_SZ> IconPath >> \windows\HTC\Assets\Images\programlauncher\Program _icon\settings_88.qtc
REG_DWORD> IsReadOnly >> 1
REG_SZ> Path >> \Windows\manila.exe