I would do my best not to make the commandbar manually. Those changes are
included in a *.xlb file. And you can't split out the important icons from the
non-important icons when you want to merge them into another computer.
Instead, I try to all the work via code. Then I can just share a workbook (or
addin) with others. They can either install the addin (Tools|Addins) or they
can just load the file when they need the functionality.
For additions to the worksheet menu bar, I really like the way John Walkenbach
does it in his menumaker workbook:
http://j-walk.com/ss/excel/tips/tip53.htm
Here's how I do it when I want a toolbar:
http://www.contextures.com/xlToolbar02.html
(from Debra Dalgleish's site)
In xl2007, those toolbars and menu modifications will show up under the addins.
And if you use xl2007:
If you want to learn about modifying the ribbon, you can start at Ron de Bruin's
site:
http://www.rondebruin.nl/ribbon.htm
http://www.rondebruin.nl/qat.htm -- For macros for all workbooks (saved as an
addin)
or
http://www.rondebruin.nl/2007addin.htm