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Hellow,
Is there any way how to get molecular orbitals (eigenvectors) projected on real space grid (like .cube file or .xsf file) or any other way of visualisation (not using RWIGS PDOS , s,p,d projection is very biassed).

Probably it's nessasary to extract it from WAVECAR somehow, but how?

there is already similar question on the forum "Extracting wave functions" but no answer.

I know that KS eigenstates are not rigorous, but still are very usefull to uderstand small systems (molecules).

use python regex. Here is an example http://code.activestate.com/recipes/181065/
I am working on this too so I will keep you posted

You can refer to the section about band decomposed charge density in the vasp manual to print out the eigenvectors you want.