the 'Other' Category in a pie chart

I would like to display a pie chart, problem is there are 54 possible groups! alot to fit into a pie chart, but many of them are very small, so I'd like to group say all the small ones (< 5%) into an 'other' category.

Any ideas?

edit: oh and im using CR9

well skinlab, in the 'on change of' part of your chart data, click Top N, in there set how many TOP categories you would like, then click the 'Others' tickbox, assign your name, and hey presto there you go. all other categories that dont fit into your TOP N (sorted on your choice.) go into this Others category.

Glad to help