Trapfinding 3.5: Clarification Needed

[Chester]

Hello folks!

Some questions regarding abilities to find/disarm traps, and finding secret doors.

1. We have a gnome rogue/bard in the party, also an elf duskblade. How do racial and class bonuses apply when, let's say, they're in a dark dungeon and there's a secret door?
2. Same question regarding finding and disarming traps (particularly for our rogue). Also, how do we go about the differences between noticing traps and actively searching for traps?
3. The difference between regular mechanical traps and magical traps?

[Psyren]

1) The elf will get a free roll if he walks next to the door even without saying he's looking for it. The gnome rogue will have to declare he is searching to notice it (which means moving very slowly in 3.5.)

2) Again, you have to declare you're Searching and using the necessary actions (full-rounds for each square, i.e. 6 seconds) otherwise you won't see anything until it's too late.

3) Magical traps can only be spotted by someone with trapfinding, though a caster with detect magic up might notice their aura too.