Menu Control?

[Cahl]

We use a Vogue for our on call people so they can check/send email when they are out and about and access a web portal we've designed to allow them access to review or change information as they need to.

One thing we're running into is they are new to the phone and they are changing settings causing the phone to not work the way it should. Any suggestions on how to "lock" the phone down so they can't get into settings or anything other than what we need them to get into?

I don't want to remove programs but am thinking more of Start Menu modification. I'd like to leave the menus there so if we need to get into the phone settings or change anything we can, so maybe a password to open up the full menu?