I'm so confused!!!

Some history...

I have a workbook that I created maybe eight years ago, that has some simple macros
that are run ONLY from this workbook, and are accessed by clicking on Tools menu,
where the macros are listed at the bottom of the normal list. This macros (and the items
on the Tools menu) are ONLY available for this particular workbook.

I have tried to duplicate this action in two ways:
1. I have simply dragged an item from the toolbar customize box to the Tools menu, and
this works fine, but then it is present on any workbook I open from then on, and of
course, I only want it to be present for this workbook.

2. I have saved the original workbook as a new workbook, then deleted everything in
the new workbook, including one of the Tools Menu items, and reassigned new macros
to the Tools Menu items. I save this new workbook, close it, reopen it, and the Tools
menu looks just as it did without saving it.

What I want to do is create macros, assign them to a toolbar (especially if it is a Tools
menu item), and make these menu items (or toolbar buttons) available ONLY to this
workbook. I am having no luck accomplishing this.

Can anyone explain why I'm having these problems?

Thanks,
Bernie