Vantage 8.03 Time Phased Material Requirements Report

We went live in January and, after working through some serious system
issues, we are testing MRP. One of the biggest problems we have seen
thus far involves the standard Time Phase report. It is nearly
unusable. Has anyone customized this report and, if so, could you
provide details on what you customized? If at all possible, I would
like to see examples of what other companies are using.