How to format SSRS 2008 Pie Chart's Legend into Table?

Question

I have a DataSet with 4 fields. For example: FieldA, FieldB, FieldC, FieldD

FieldA is the data field, and FieldB is the category field.

Normally the Legend will display the category field. By applying custom format in the Series Properties --> Legend --> Custom legend text, I could format it like this: FieldB - FieldC - FieldD

Because the length of the data in the FieldB, FieldC, and FieldD are not uniform, it looks not good.

Anyone know how to format it (the legend with FieldB, FieldC, and FieldD) into a table layout?

It's SSRS 2008.

Thanks in advance.