I had them glued on as everyone else has described. The shoe repairman said that they would work with the soles on the BMW All Around Boots, but couldn't guarantee it would work with any boots, he said it depended on what the sole was made out of..............here's some pictures:
He told me these would not be great for doing a lot of walking around, but I usually bring another pair of shoes if I
plan to do any significant walking anyway. I realize they sort of look like Frankenstein shoes, but trust me when I
tell you that nobody notices them when you're going down the road. I hope this is helpful.