http://www.raileurope.com/rail-tickets- ... index.html

Ok, it says

Here's what you get:
This pass gives you unlimited travel on the national rail networks of 3, 4 or 5 bordering countries connected by train or ship.

Choice of countries include: Austria, Benelux (includes Belgium, Luxembourg, The Netherlands), Bulgaria, Croatia/Slovenia, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Montenegro/Serbia, Norway, Portugal, Republic of Ireland (includes Northern Ireland), Romania, Spain, Sweden, and Switzerland.

Choice of 5, 6, 8, 10 or 15 days within 2 months, consecutively or not.

What the hell does it mean "Choice of 5, 6, 8, 10 or 15 days within 2 months, consecutively or not." Does that mean I can only ride the train unlimited for 5 days out of 2 months, if i select the 5 day option? What if the actual train ride takes a long time?

It does mean that you can only ride it 5 days during the period. Its like a 5 day pass you can use any tie within 2 months. I think they punch your ticket the day the ride starts so if it is longer than a day train ride, it only costs you a day (but I am not sure on this -- I don't remember).