If you can use newspaper-style columns, then all you need to do is apply the
numbering to the paragraph style. If all the numbers will be begin with BMC
064, then you can type that in as plain text.
1. The best way to approach this is to assign a specific style to the
paragraphs to be numbered. If you're not already using it, start with List
Number. Apply it to one of your paragraphs.
2. With the insertion point in a List Number paragraph, go to the Modify
Style dialog (see
http://www.shaunakelly.com/word/styles/ModifyAStyle.html
if you don't know how to do that), click Format, and choose Numbering...
3. In the Bullets and Numbering dialog, you will see a gallery of choices;
the one that is selected will say List Number. Leave that selected and click
Customize...
4. In the Customize Numbered List dialog, you will see a box labeled "Number
format." It will contain a 1 followed by a period. The 1 is in a gray box;
this indicates that it is a field, and that is the part of the number that
will change.
5. You'll probably want to delete the period after the 1. Before the 1, type
BMC 064.
6. In the "Number style" box, select 01, 02, 03... (the last selection;
you'll have to scroll down to see it). This will take care of your numbering
provided it doesn't exceed BMC 06499.
7. Click OK three times to close the dialogs.
8. Apply the List Number style to the paragraphs you want numbered this way.