Please use https://lists.sourceforge.net/lists/listinfo/pymol-users to ask questions.
No, Edu-PyMOL is provided for free to individuals. We ask you to purchase a classroom or department license to equip facility computers. See http://pymol.org/academic.
Yes. Please register with "Institution / Subject Matter / Instructor: self-study"
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You can create a high resolution shader rendered image which will be close to ray trace quality:
set use_shaders png image.png, 4000, 3000
No. We consider publishing to be a professional task which is beyond education. Schrödinger does not approve usage of Edu-PyMOL for professional work.