Adding attachments for each feature in Flex??????

Hello all,

I am using the application builder in ArcGIS Viewer for Flex(v.3.3) as a student. I would like attach a different excel spreadsheet for each pop-up within a layer. Is there a way to do this? I know you can add general attachments that affect the whole layer, but is
there a way to specifically add different ones to each feature within the layer?

Thanks,
Braden Pierson