I'm working on updating an AD&D adventure into 3.0, and it's going alright, I suppose, but the Find Doors checks (and similar, non-combat related rolls, stats, etc.) have me completly stymied. How does a -10% to find hidden doors rolls compare to the 3.0 Search DC? I've never played 2e (obviously), and the only book that wasn't 3.0 or higher was a MM, so I'm really lost. Any sort of help would be greatly appreciated, because I might be in over my head.