So far this is the situation: I've done EVERY (e.g. Nociduas, drakes, Demonslayer, even the Shaynee's fetch-o-rama) optional quest that u can do before Rentar's fort (character's average out at level 30 or so), have cleared out most sections leading up to the fort and beneath (only those with pointless pylons left alive) and CANNOT open any of the doors as they are WAY above my thief's level 26 tool use skill (most are 30, two are 40). Are these doors as I suspect the entrances to the keep proper?? HELP!