What You will need:
3. Your self signed CER file (see this post for more info on getting your CER file.
Use the certificate modification tool to import the certificate, then use PalmDesktop to copy the certificate to the device.
It has been a while since I’ve done this so I forget all of the tricky details but I do remember that I had to power cycle the phone after EVERY step.
This post on the Palm forums was very helpful.
Also, posting on the forums http://forums.palmone.com could be helpful.