Hi Jamal,
1. No.
2. Your second screenshot suggests you're trying to call the macro via a link that points to the 'ThisDocument' module in your 'Document1', not in the 'Acronym Manager'. Try activating the document you want to update, then press F11 and run the macro directly from the vbe. As you've noted, the code also provides a means of running it from a different document to the one your list is in. That means you could add it to Word's 'Normal' template and run the macro from there simply comment out the 'Set FRDoc = ThisDocument' line and un-comment the 'Set FRDoc = Documents.Open' line and update the file reference there to point to whever you want to keep your own list (just make sure that document doesn't have any macros).
3. Aside from adding the code to your 'Normal' template, you could keep the file in a 'trusted location'. See:
http://office.microsoft.com/en-us/he...010031999.aspx