I have experience in flying in Romania if that is what you require...
It is possible to fly VFR there but only with prior permission of the Romanian CAA, which can be obtained a few days before the trip. They will require most plane papers (by fax or email) such as insurance cover and CofA as well as details on the nav/com equipment.
They will then obtain permission for you from the military and give you a permission number to enter on your flight plan.
Jeppesen apparently now has VFR maps of Romania and I believe the AIP is available on line (CAA.RO) .
PM me if you need further info, I have never flown in to the Ukraine itself