Thanks everyone, for the assistance, although I still feel that a step by step explanation of how to remove the headliner panel attached to the sliding metal sunroof panel (without breaking anything!) would send me on my way. I have no doubts about installing the felt seals.
Not very detailed, but this may of be some help. http://www.e9-driven.com/Public/Library/BMW-E9-Manual/pages/en/54121000.html