Group By View on Multiple Choice Field

Hi,

We are currently trying to create a view on a list and have it grouped by a multiple choice field. For example, this list contains key documents to the organization. Each document in the list has a column named "Category". A document could be classified under more than one category (ex: Policy, Standard, and Reference). However, with the current out-of-the-box limitations of MOSS 2007, we can't set the view to be grouped by the "Category" column since it is multiple choice. What we would like, is a view were the same document could appear many times under each category it is assigned to.

Any ideas on how this can be achieved? Thanks