Bulk add users to a distribution group from a CSV file from UI

Hi,

I am trying to customize the FIM portal to enable the user to bulk add a list of users from a CSV file into a distribution group. What would be the best way to do this? I have a PowerShell script that can do this, but I want to modify the FIM UI to allow the user to easily use a CSV file containing a list of users when creating or modifying a DG.

Thanks,

Sam