You mean the bug that you won't find Greece or Serbia in the country selector? Is it because they are supposed to be only revolters and not actual states in 1492? I couldn't find Greece at the beginning (in the place of P/L) but then I found them in the place of Turkey. Perhaps one should shich the country-to-be-replaced once to get those two countries?
Or pehaps it was only my mistake. However Greece and Serbia ARE playable in IGC2.0f, since I have started a game as Greece.
Strategically of course, the only way to survive as Greece is to borrow 1000 ducats, build fortifications + a monster army, ally with Serbia and Georgia and wait untill Turkey gets in a war and loses most of it's huge starting army and has the rest of it fighting in Palestine. Then DoW and try to get Albania, Macedonia and Thrace and take the first two in peace before the Turkish AI gets back to you (in that case you have no chance: you will have less tech, less morale and soon afterwards less troops and you will end up with both your provinces sieged and not a chance to fight back, but just await annexation. Greece is even worse than Granada, since it has much lower chances to win a battle, since the Turkish troops are the cheapest and best, while the spanish are the most expensive.
Serbia must be somewhat easier, since it can avoid fighting the Turk and try to take Lebensraum out of Hungary or Venice.