Time Phased Material Requirements Report

We're looking to modify the filtering on the Time Phased Material Requirements report. We would like to be able to filter by certain parts, a range of parts or by product group. This is one of the canned progress reports. I know we can't modify it. I'm hoping there is some way to modify the filtering though. Does anyone know if this is possible?

Worst case, I will recreate the report in crystal. I don't want to have to go through all that work if I don't have to though.