I think the Clua Console Cheat with Solaufein is the best test you can make. Everybody should make this test if you install the game new (exspecially with different Mods).
I dit dont make it one time (my first time playing with the Solaufein Mod). I played till Ust Natha and everything with Solaufein was all right. But at the Moment we leaved quickly the Drowtown and Sola wanted to join my group ..... he speaked my words and I speaked somehow his words - it was a disaster.
Its really hard when you see that you have installed the wrong Mods together and you see it AFTER Ust Natha.
Till this I installed / played BG2 and all the mods a few times (always with Solaufein). And I always make the Sola-Test: Talking with Sola at the beginning. If he talk "normal": Leave the game and restart a older savegame - without Sola.
Its really a quick, good Test - I recommend it to everybody.
What happen if you come to Ust Natha and meet Solaufein WITH Solaufein - sorry, dont know. Never played with Solaufein from the beginning
But .... its really a interesting question.
[!--EDIT|Lump|Oct 24 2002, 01:38 PM--]