keypad locking the mail app? possible?

[pakostevens]

is there a way to keypad lock restrict more apps than the ones that are listed in the iphone general lock settings?

I mainly need the mail app locked.

[jmann]

If your phone is jailbroken you can lock specific apps using an app downloaded from Cydia. LockDown I believe it is called.

[pakostevens]

While not as clean as the default settings app locking.
Lockdown will work.
Thanks!