I've now used the patch and it was exactly the sound that I was looking for (some changes to the eq in the STM mixer made it even better). Planetz is perfect.
The difference between this sound and the VSTi-synths that I've tried before, is that the "Creamware-synths" sounds more 'alive' and has a deep, and it gives a much better feeling while composing new melodies (in other words, I think the "Creamware-synths" sounds more like a hardware synth, while the VSTi-synths seems to be missing the deep in the sound. Ofcourse there is a drawback with the Creamware-synths and that is the DSP problem, but you can't get it all
Stephen, thanks for the Hummel Bluesynth !