A pillars have a screw under the plastic SRS tab, remove all the other pillars and get ready to remove a big piece of pressboard. I did in in a 750iL one time, took some interesting moving around of the seats, coming sideways out the back door to get it out. You wouldn't have to completely remove it from the car to be able to bolt on the roof rails, but you'd better make sure you really want roof rails before you start remomving the headliner and drilling holes into your roof before you do this.

As pretty as the X is, I think it's a sin to put stuff onto the roof, so deleting them was the first thing I did. If it doesn't fit in the trunk, I don't need it. It's so much easier to wash and dry now that I don't have to work around them.

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