adding JPEJ image for signatures and desktop wall paper in blackberry devices

Dear Sir ,
                     we have BES server version 5.0.1 , for my users who are having blackberry devices , i want to add company logo , ( which is in JPEG format) in there blackberry signatures and also want the blackberry background screen should have company wall paper .
is it possible ?
kindly advice
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Unfortunately signatures sent from the blackberry are plain text only. You can modify the global server settings to append a signature, but from memory this too is only plain text.

A user can change the background of their screen, but this isn't enforced by the BES. You can create a theme with your company logo, but once again, themes aren't enforced by the BES.

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