2000 Bonneville power sunroof

Hello, I just found this forum and it's great! The power sunroof on my wife's Bonneville won't open. The motor is working but it must be off track or a broken part. How much trouble is it to remove and replace? Any ideas? Thanks.

huge pain in da butt, recommend having a shop do it, if you screw it up and wont seal properly and leak like a sieve