Bump on this connection thread. I searched but could not find anything resembling my situation, any adivce would be much appreciated.

I have a round trip ticket on Alitalia from JFK to FCO in Februrary. Am looking to take a weekend break after completion of business which would have me purchase an additional Alitalia roundtrip ticket from FCO to ATH. On the return the ATH-FCO flight arrives 08:05 and the FCO-JFK departs at 10:25. My question is about connection time and luggage, can I have bags tagged all the way through if on seperate tickets? And is 2 hours enough time to connect from EU flight to International departure?