This is how I mounted a Dinotte and a cateye LD1100 to my rear rack when I commuted....
http://i164.photobucket.com/albums/u...jects/0033.jpg
On my Rambouilette road bike, this is how I mount the Dinotte....
http://i164.photobucket.com/albums/u...ects/001-1.jpg
In addition to the Dinotte, I mount two cateye LD600s on the chain stays in a vertical position. They can be seen in this pic.
http://i164.photobucket.com/albums/u...flyer/0012.jpg
Hope this helps......