Bind each keyboard layout to keys combination
Hurray! I found a way:


Add layouts in side bar
create an applescript 


like this:

on changeKeyboardLayout(layoutName)
tell application "System Events" to tell process "SystemUIServer"
    tell (1st menu bar item of menu bar 1 whose description is "text input") to {click, click (menu 1's menu item layoutName)}
end tell
end changeKeyboardLayout

changeKeyboardLayout("US Extended")


3.Save it in /Library/Scripts

4.Bind it to the keys combination using FastScript