[Touch HD Themes and Apps] ammar:
Here is the registry of action screen that control the shortcuts of each icon

you can change the path for any icon to start any program you like

First icon from top left is APP_0

Last icon bottom right is APP_11

Example: If you want to use ThumbCal to open your appointments and tasks then you should change the following paths:

HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_3

Path \Program Files\ThumbCal\ThumbCal.exe

HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_4

Path \Program Files\ThumbCal\ThumbCal.exe

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_1]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="\\windows\\tmail.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:000000a0
"yPos"=dword:00000009
"Param"="-service \"SMS\" -to \"\""
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_0]
"Name"=""
"Height"=dword:00000078
"IconSelectPath"=""
"xPos"=dword:00000000
"Type"=dword:00000000
"Param"="-service"
"IconPath"=""
"Width"=dword:00000078
"yPos"=dword:00000009
"IconPressPath"=""
"Path"="\\windows\\tmail.exe"

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_2]
"Name"=""
"Type"=dword:00000000
"Height"=dword:00000078
"IconSelectPath"=""
"IconPressPath"=""
"IconPath"=""
"Path"="%InstallDir%\\MMSLauncher.exe"
"Width"=dword:00000078
"Param"=""
"xPos"=dword:00000140
"yPos"=dword:00000009

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_3]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="\\windows\\poutlook.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:00000000
"yPos"=dword:00000118
"Param"="calendar -new"
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_4]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="\\windows\\poutlook.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:000000a0
"yPos"=dword:00000118
"Param"="tasks -new"
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_5]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="\\windows\\notes.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:00000140
"yPos"=dword:00000118
"Param"="-n"
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_6]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="\\windows\\poutlook.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:00000000
"yPos"=dword:000001cc
"Param"="contacts -new"
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_7]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="%InstallDir%\\Wifi_ON-OFF.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:000000a0
"yPos"=dword:000001cc
"Param"=""
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_8]
"Name"=""
"Width"=dword:00000078
"IconSelectPath"=""
"IconPath"=""
"Path"="%InstallDir%\\ToggleBTh.exe"
"Height"=dword:00000078
"Type"=dword:00000000
"xPos"=dword:00000140
"yPos"=dword:000001cc
"Param"=""
"IconPressPath"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Manila]
"HomeRSKPath"="\\Windows\\HTCActionScreen.exe"
"HomeRSKText"="Action"

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_9]
"Type"=dword:00000000
"Height"=dword:00000078
"IconSelectPath"=""
"IconPressPath"=""
"IconPath"=""
"Path"="\\Windows\\Camera.exe"
"Width"=dword:00000078
"Param"=""
"xPos"=dword:00000000
"yPos"=dword:00000294
"Name"=""

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_10]
"Name"=""
"yPos"=dword:00000294
"xPos"=dword:000000b4
"Param"=""
"Width"=dword:00000078
"Path"="\\program files\\GoogleMaps\\GoogleMaps.exe"
"IconPath"=""
"IconPressPath"=""
"IconSelectPath"=""
"Height"=dword:00000078
"Type"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\HTC\Biotouch\ActionScreen\APP_11]
"Name"=""
"yPos"=dword:00000294
"xPos"=dword:00000154
"Param"=""
"Width"=dword:00000078
"Path"="%InstallDir%\\HDSoftReset.exe"
"IconPath"=""
"IconPressPath"=""
"IconSelectPath"=""
"Height"=dword:00000078
"Type"=dword:00000000