03-08-2009 08:06 PM
03-09-2009 05:44 AM
I don't have any experience with this, but I'll give it a shot anyway.
First, you'll have to download and install the OS for your device. Find your carrier here and download the same version OS as your device is currently running.
When you run the installation (either from Desktop Manager's Application Loader or by running "C:\Program Files\Common Files\Research In Motion\AppLoader\Loader.exe", install the SMIME package. If you're running and older OS that doesn't have the package, you'll have to upgrade your device's OS.
Info on using SMIME can be found here.