Just bought the Enhanced Edition from Steam during the Midweek Madness, Can someone explain to me how the party works? There's a maximum of six including yourself, I currently have Imoen, Xzar, Montaron, Khalid and Jaheira, but I just saved Viconia and she wants to join my party. What happens to the character I kick from my party? I know I can talk to them to add them back, but where do they go and how do I know where to find them?

If I recall correctly, they just stand around where you left them like feckless eejits. I don't know if they can be killed by beasts or not, but it's probably best to reform your party somewhere you'll frequent.

They will tell you where they will go. However some characters are tied. Montaron and Xzar are linked as are Khalid and Jaheria so kicking one will cause the other to leave. Also know that your actions (alignment) will limit who will stay in your party.

I think most will stay put, though with some exception like Kivan and Shar-Teel.

A lot will leave (permanently) if you refuse them the first time though, this includes Viconia, Branwen, Yeslick and maybe Xan (I'm not certain).

Khalid and Jaheira will go to the Friendly Arms Inn if you refuse them the first time.

Of course some are pairs and will leave (and stay where you leave them) when the other one does. These are Khalid and Jaheira, Minsc and Dynaheir.

Also if you have Dynaheir in your party, Edwin will leave permanently if you kick him.

They will remove themselves from your party and tell you where you can find them. Some characters - Khalid/Jaheira, Montaron/Xzar and I think Minsc/Dynaheir are tied together. However, there is an exploit to have, for example, both Edwin and Minsc at the same time.

I could be remembering wrong, but I think there's also a condition where they will vanish permanently if they leave while your reputation is at a value that they don't like. For example if your reputation is quite high and you kick out an evil character, they might storm off forever. Like I say, could be remembering wrong. I know there's a chance that party members will snap of their own accord if there's too much of a reputation/alignment mismatch.