I found a small app (IrfanView) that let me set the color depth and it pretty much ruled out alot of marks. The rest of the I edited out - not using Xara this time but Serif PhotoPlus 6 which is a quite nice free software.
I know Sibelius is a great piece of software, I would've loved to have if it wouldn't have been so expensive. It beats the competion at those graphical tasks which I occationally need.
Anyway... Thanks for all the tips!
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