DM2 Cave of Silver

[Prince of Kitties]

I'm playing DM2 and am in the Cave of Silver (under the Frozen Cavern or whatever it's called, the one with the ice drakes). And... I don't know what to do. There's a secret door which according to Magic Map leads to a treasure room, but I can't get to the door without setting off a trap that closes it and summons hostiles. There's a hallway around the secret door, but it's walled off (and there are no secret doors in the walls). There's a lever... Which doesn't seem to do anything. What am I supposed to do to get to the treasure and whatever else there is in this place?

 

(FWIW, the Cave of Silver isn't covered in Luz's hints.)

[Prince of Kitties]

... Hmm, treasure room contains a bunch of cursed items. Useless.

 

Meanwhile, there's a whole other part of this dungeon, where Silver Dragon is presumably hiding... How do I get there?

[The Creator]

It's been too long since I played it, so I don't know. The only thing I can think of is move mountains.

 

Wait a sec... DM2 features a kind of attackable terrain setup. if there are are any levers or buttons you can see but can't reach, try shooting them.

[Prince of Kitties]

Thanks... It turned out there was a button hidden in a pillar. D'oh.