little feet thing? you mean the bit that the glass roof part bolts on to the rails?
there are two little plastic screws on the inside.. just unscrew them and then it's two bolts either side. then go from there... you'll see the light from there!
when i replaced my sunroof, I found so much gunk in the rails and I cleaned it all out with rags and a cotton bud to get in to the smaller spaces and re-lubed it using a combo of silicon spray and bearing grease.
I had also found htat part of the little feet thing was actually broken into the rail jamming things up.... well i actually broke it and then felt all tough for being able to fix it again lol