I can't remember but doesn't the tank bib also attach at the other end under the seat?
If it does Gerry, just remove the bolt behind the pillion, lift off the pillion by pulling back and up. Then remove the bolt behind the seat. After that lift off the seat the same way as the pillion, that will expose the tank bolt, remove that. Lay the tank cover on and then reverse the process.
The top part of the tank cover is just as the others have said. You could do top and bottom separately if you are concern with getting yourself confused but once you've done it you'll be surprised how easy it all is.
