Ok - so now I tried to "do it again". I normally save all my steps when postworking on an image, but this time I didn't... so I had to do step 2-6 again (you might notice that the colours slightly change between image 6 and image 7...)
So here's the explanation:
1) original shot
2) "watercolour"-filter applied (for anyone in Germany: Data Becker 400 Fotoeffekte) to sharpen the image
3) "dreamy"-filter applied (opticVerse Labs - Virtual Photographer) with full softness
4) copy of image 2) with "dreamy"-filter and less softness and PSP7 "sharpness-correction"
5) image 4) "masked" (also Data Becker...)
6) image 5) inserted into image 3)
7) some cloning to avoid edges between lighter and darker parts
8) "oil painting"-filter applied (Ulead Photo Express 4.0)
9) slightly pink spot applied (Ulead Photo Express 4.0)
You see I'm kind of a program-hopper, but even though you probably have different ones you might find filters that work just as well for you...