Originally Posted by Gonzo the Gr8
When you get to the "Save & Continue" statue in the area that Gandalf the Grey goes after the Dragon THIS IS WHERE YOU SAVE & Continue. Then hit the start button AND THEN EXIT. DO NOT SAVE & EXIT... Just EXIT. My timer from load up to achievement popping was 6:32.30. I even hit the save again. You have to finish the Dragon for Gimli to hit the last rock to escape.
Although my run through seemed pretty quick overall, I think 3 total would do me just fine! This worked perfectly and was no hassle at all really. The Save Point is the one just before you start going down the stairs.