Looking for a way to lock IE on WM 6.5 into fullscreen mode.

As far as I understand from googling and techseraching there is no way to disable the options button in the fulscreen mode - am i right? Even in the latest BSP?

I know that Pockebrowser has this functionality - but it costs...

Background: customer is using a custom version of MS9090-S with CE5 and CE5 has the kiosk mode for IE. Now MC9090-S is EoS and we're trying to move them to MC95...

Any advice? Any hidden regkeys or custom launchers?

Thanks, Valery