Try Universal Hints (www.uhs-hints.com) for a click-by-click solution. I spent two days wandering around in those air ducts, even with Mag's WT and couldn't seem to find my way out. I didn't know whether "F" meant one click forward or go forward until you have to turn , and I tried every possible variation with no success. Anyway UHS is still there if you need it.

Thanks, SuMac. UHS Hints is a very helpful website, I agree.