I have no advice, since I'm not currently very regular with exercise. I know I need to be though... so I have a question for you! What are you doing for 1.5 hours? I have some exercise videos, and some games, and they are 30 minutes, not much longer...
I am however impressed with your dedication, and wish you could pass some of that along to me. I'd definitely spend 1.5 hours a day exercising (if I could figure out what to do) if it meant my weight loss would speed up! So Congrats on that, you rock!!
-Aimee