Disable IE Standard Buttons toolbar

We are replacing a kiosk which is used to access a portal on our Intranet.
Most of this workstation's settings are controlled by Policies upon
connection to the network. There is one setting that is holding things up.
When IE launches the Standard Buttons Toolbar is Enabled. An apparently
blank screen displays as a result.

If possible, I would like to avoid tweaking things locally and instead rely
upon a Policy to make this work.

All suggestions are welcome.

- Robert