it looks like ukraine, portugal and russia are definites. most likely cska and either shaktar or dynamo kiev from ukraine or braga or benfica from portugal.
the 4th one is up in the air. alkmaar, psv, twente, hevereen and feyenoord are all in a 4 way battle for 2nd in holland.
panathaniakos have got 2nd in greece wrapped and have a higher points total than hevereen, az alkmaar and feyenoord so if one of those teams gets the place in holland the greeks would be the 4th seeded team.