Is there a way I can get the Alt+Shift+Left/Right Arrow keyboard shortcuts to do their magic on styles other that headings?

In Word 2007, the Alt+Shift+Left/Right Arrow keys with will decrease/increase the heading level. For example, if the cursor is on a Heading 2 style, pressing Alt+Shift+Right Arrow will change it to a Heading 3. Pressing that again will convert it to a Heading 4. This goes as far as Heading 9 and then stops. It will also go the other way using Alt+Shift+left arrow, stopping at Heading 1.

I have a document with a glossary. I have defined two styles: $GlossaryTerm & $GlossaryBody. I have them set up so that style following is set to the other style of the pair. This works fine if I have just one paragraph of body text for each term. But not so good if I need a second (or third) paragraph.

Is there a way to get the Alt+Shift+Left/Right Arrow keys to work on these styles? I'd it to be just two steps between these two styles.

I know I can write a macro to do this and assign it to a keyboard shortcut, but that's another macro to maintain and another shortcut to remember.

Thanks