Mrs G used to work for 3M so adhesives spring to mind. If you don't wnat permanent they do a good range of 'command' stick products which hold lots of weight until pulled a certain direction - all to do with the molecular structure of the bond. Double sided tape and velcro also spring to mind. In the UK 3M ceratinly have a good help desk for adhesives and they would be able to advise accordingly.

Cheers

DeG