Import Root CA in the Nokia E61

Last week, I recieved my new Nokia E61i. As soon as I tried to connect to my own IMAP server (over SSL/TLS) is started nagging about the (selfsigned) SSL certificate.
The E61 has a certificate store, so I should be able to add other Root CA's to this store, but this is where the trouble began.
The manual has a chapter on certificates, but it lacks a working explanation on "how to import third party root CA's". On my old iPaq, it was simply upload a DER encoded certificate, click on it, and it would install. Well this doesn't work on the E61 (and many other Symbian-based) phones. Just 'google', and you'll find lot's of people with similar problems...
The working solution I found uses a website from which you download the certificate with the phone, but there is a catch; you need to add a MIME-type to the website containing the certificate (hence the admin rights).






