I got DV 2010 visa, but I am currently still studying in foreign university till September 2010. I decided to come here for 2 weeks, leaving school for a while to process the green card. Would I be able to visit US, just to taking care of the issue and request a reentry permit at the same time, so that I could enter US permanently after I graduate?
This appears to be a classical case where a reentry permit is a good choice. There is an event (graduation) that is keeping you out for a certain length of time. I do not practice in DV area so I have no clue if there is something you need to worry about in that respect. You will of course have to be in USA to apply for a reentry permit and biometrics.