all of my insidelevel is dark. Does not look ok. Seems to only use the Sun for the Shadow generation.
Yes. PSSM shadows are only suited for outdoor levels. For indoor spotlights, adapting the softshadowmapping example in the samples\ folder might be sufficient. For point lights you have to make something on your own... there are enough papers and books about this available, like ShaderX 6, 7.
