More than one Foreign PointID Expression

Has anyone managed to use the Foreign PointID Expression for more than one associated exploratory hole.

I've set up a field in a table with the point list I want to plot, seperated by commas.  For example, BH01a has "BH01b, BH01c, BH01d" in that field.

I can use the GetListItem to target one, but I can't get more than one associated point into the column.  For some locations I have a large number of associated points, so I'd like to put them in one column in report design.

Has anyone faced a similar problem?

Thanks