I'd suggest making notes on the next dungeon, the one after that's slightly more linear but it's riddled with random encounters. I've spent 1 hour and 20 minutes getting to the end, even missing a branch. (Only to die immediatly after the boss because I lacked items and for another good reason, resulting in having to redo 1/4'th of the dungeon.)
Suffice to say, it killed my motivation and I played through Megaman ZX Advent for the bazillionth time rather than doing Tales of Innocence again.
Actually, I still have the dungeon map I drew with me. If you want I can upload it. Makes life considerably easier.
Map Took the liberty of making one RQ before heading to bed. Floor 4 might be a bit off, floor 1 and 5 aren't respresented. Floor 1, head left first, follow path till chest. Then head back to the first intersection, head right this time and simply follow the right wall till the next floor.
Yellow is treasure, red is the start, blue is the ending, except for floor 4, I marked the start as blue by accident.
It's not much, but it should save some amount of annoyance. Also, the treasure is done from the top of my head, so it might be a bit off. Rule of thumb is that every dead end holds treasure.
Edit moar: Floor 2, 3 and 4. Left to right. My bad.
Edited, Jul 10th 2010 6:40pm by BlackyLakshmi