Once you have the tab set up and those buttons working you can put them on the QAT from within the Word interface.

1. Open your template that holds the macros and custom tab (I assume it to be the same template).
2. Go to your QAT dropdown on the right and choose more commands.
3. Set it to save in your template.
4. From the list on the left choose your custom tab.
5. Pick your commands and move them to the QAT.
6. Save your templatce and close Word.
7. If you want go into your editor and make your tab not visible.
8. Make sure your template is stored in the Startup folder.
9. Restart Word.

If you want, send me your template (with a reference to this question) and I'll take a look at it. Ribbon XML is a bit arcane.
[email removed for privacy.]