Swing/JTree/multiple selection of nodes

Thanks,

I am attempting to add copy/paste functionality to my tree. I want to allow multiple items to be copied.
I am having a mess of a time working with the selection once it is made. Also most of my other tree
functionality was done with single selection in mind which now needs to be reworked.

If you have experience with this or have a resource to recomand It will be greatly appriciated.

I have also realized that I will have to teach people how to use the mouse over again because jave
user interface does not work exactly as the Windows standard, Any thoughts?

Thanks.