These are my questions:

In one of my later games I remember where the Hammer of Thunderbolts is but I don't remember how I got past the secret door. Does anyone know how to open this door, it is the one in the sewers under the temple district leading to the mind flayers.

And my second question, I am currently playing a party of my (8th level Fighter/dual/16th level mage), viconia and minsc. Now I think i'm getting closer to viconia, the romance is at the point where she (when turning cold) doesn't completely trash me.
(She has just apollygiesed for thinking that I should not be allowed to have power because I am a male). The is after I have listened to her funny stories of drow erotics, and killing farmers etc.

By the way, i'm not sure of this but, I have been toled that you can get some item with a picture of the one your PC has a romance with. I think it is in the docks but I can't seem to find it.

And one more thing: I have also been toled that you can change viconias alignment to good, I would like to know how if anyone knows!!

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I decide who lives or dies

The key is in Firkaags dungeon in the winspear hills.

You can change her alignment but I have never managed. You are supposed to always be nice with her always giving the good responses to dialogues, also I thing a good aligned PC and high reputation are needed.

Change alignment. That can be done in ToB. Never heard it should be possible in SoA.

Righty. I think that it is possible to change your allignment in this game. I think that there is a Helm of Opposite Allignment. I cant quite remember. The girdle changes you gender, but I am not 100% sure that this helmet exists. Get Shadowkeeper and check. You dont have to cheat to get it, but just use it to see if there is such a helmet.

you say the key is in firekrags dungeon, what part of it would that be?

by the way is it possible to buy a trinket with the picture of the romance inside?

oh yeah and the idea was to turn her good through roleplay, not with a cursed item :)

The key is on Tazok (The big guy who was at your battle with Sarevok).
The Keepsake Locket (the item with the picture of your love) is purchased from a merchant in the docks district during Jaheira's romance only.