Thanks, Oaky.
I've done that, choosing CTRL+F5 as a key combo, as it was not otherwise assigned.
However, while I can run my macro named 'BulkEdit' laboriously by clicking Tools>Macros>Run and choosing the correct macro, the key combo I've assigned doesn't make it happen.
If I check under Tools>Customize>Shortcut keys, there's my macro assigned to CTRL+F5, listed as 'vnd.sun.star.script: Standard.Module1.BulkEdit?language=Basic&location=application', but holding down CTRL and pressing F5 does not execute the macro.