The Certificate Import Tool for Symbian S60 (and other) phones was created on a lousy Sunday afternoon. Mainly, because I was frustrated with the lack of documentation AND support from Nokia on the issue. Nevertheless, it seems that really lots of people are using it (approx 300 a week), and every now and then I receive a donation through PayPal (just click on the donate button).
So to all the donators (you know who you are);
thanks for showing your appreciation!