Change only the font of numerics/numbers in Word 2007

How do I change the font used by numbers, or numerics, in a Word 2007 document?

For the rest of the document, they would be using another font for the letters and such, but I would like the numbers to be in a different font altogether.

If this is possible, how do I set it?

You cannot "set" this, but you can use find and replace to apply a character style (or font directly) on what is matched.

Select the "More>>" button to see the option to search with wildcards, then use ([0-9]{1,}) to find sequences of 1 or more digits (see the help for more details on wildcard patterns). Use \1 in the replacement to just keep the same text.

Under the replace group in the dialogue there is a "format" button, use this to select the format you want to apply.