In most HP drivers, there's a tab called "printing shortcuts" where you can predefine popular setting combinations (like "greyscale duplex" or so...)

Have anyone succeeded in distributing these shortcuts with iPrint/Printer Profiles?

Settings seems to be stored under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\<PrinterName>\HPP resetRoot\CustomShortcutPoolData