Italian States
I'm at work so don't have the game handy atm, but I'll look over the starting Italian relations. My first thought though, from playing Genoa and Venice a few times is that starting stabilities should probably be really low, especially in Naples and the papal states. Most of the entire reign of Alexander VI was spent in what was basically a civil war or in wars with Naples. Florence should also be relatively unstable with Pisa having a high revolt risk. Starting relationships, though, hmmm...kinda hard to do with Italy in 1492. Do we want what was accurate at 1492 or at some relatively stable point a bit later (1494-1498 after the Naples question was more hashed out?). Off the top of my head, these are the basic Italian relations in 1492 (I'll check my sources a bit more when I get home and check against the game values also):
Genoa - pretty much an extension of Milan. I think this is modelled already via vassalization. There relations should probably follow Milanease to some extent.
Milan - Friends with the papal states, fairly close to France. RM with papal states if that is possible. Enemies of Naples. Positive with Venice. Indifferent to the other Italian states.
Venice - Negative relations with Papal States, positive with Milan. Negative with other Italian states.
Naples - Spanish vassal, highly unstable as there were 3 forces (France, Spain and Papal states) all trying to control Naples. RM with papal states, florence. Negative relations with papal states and milan and france. Good with spain. Good with Florence.
Papal states - RMs with naples, florence and milan (can papal states do RMs? probably not, but just for the record). Neutral toward france (changed almost monthly). Positive with Milan (probably the best papal states ally). Negative with Spain, Positive with Venice (but not high), Negative with Naples. Highly unstable in 1492 and remained unstable for a number of years as the borgias tried to gain control of the papal states.
Florence - Traditional enemies are Venice. Friends are Naples. Slight positive toward papal states. Friends with France. Negative Spain. Neutral toward others. -1 to 0ish stability unless you can model its northern territories as more chance for revolution. RM with naples and papal states. Should probably start out allied to France.
=== This goes in the leader thread, just collecting my thoughts so I don't forget them ====
A few Italian generals of note. Note, however, that most were condottieri and basically mercenaries, so assigning them a country is tough. For the most part, "Italian league" wars were fought by generals nominally control by the papal states. I'll add some dates and stats when I do a bit more research. Note however, that with the exception of Cesare Borgia and one or two others, they were mostly really bad
Cesare Borgia - October 1499 - August 1503. Papal states, current values pretty good.
Juan Borgia (Duke of Gandia) - August 1496 - June 1497. Captain-General of the papal states. He pretty much sucked. Brother of Cesare. He was killed in 1497, some say by his brother, Cesare.
Guidobaldo da Montefeltro (Duke of Urbino) - August 1496 - January 1497 (he lived longer, but this is pretty much it for fighting as he was captured). He was the other big general for the papal states early on and did a campaign with Juan that ended rather disasterously.
Fabrizio Colonna - still deciding where to put him. A good general.
Orsini, Count of Pitigliano - January 1492 - August 1496(?). Papal states captain-general.
Giovanni Sforza - January 1492 - August 1496(?). Husband of Lucrezia Borgia and an inept soldier. Despite his name, a papal states general.
Virgino Orsini - 1492 - ???. Still working the dates. A naples general. Mediocre at best. He is also the Orsini mentioned above, the papal states captain-general, hehe.
The period 1492-1503, at any rate, was one dominated by Cesare Borgia and the papal states. There really aren't any other Italian generals at this time. Well, there are, but they are mostly really bad. Being notworthy for how fast they surrender or how fast they are killed by Cesare. There are some good rulers, however, in Venice, Florence and Milan to counter the papal states.