Eurail P to Germany, Austria, Slovakia, and Czech?

I am landing in Frankfurt and want to train to munich, then train to Bratislava (through austria) then train to Prague, and finally up to Berlin. I can't find packages that effectively cover these countries. In fact I barely see Slovakia on any of the websites other than in some "eastern europe packages." Are they not a part of the network? Why is Slovakia not even listed as boardering Austria, am I missing some sort of political distinction from Czech?