Co-ownership ?

[abanjoplayer]

I decided to have a go at the San Marino challenge for this year's FM and as it's my first time managing in Italy, I'm completely new to the idea of co-ownership deals. I've read through some posts about them on fm2012 and they seem to be the same, but what I was wondering is what is a good way to take advantage of them? I've heard people speak of 'abusing' the co-ownership deals, so to speak, but it has left me confused as I have no idea what to do.

Any tips / help would be greatly appreciated