Rumint is a network and security visualization tool. It allows you to load packet capture files as well as perform live packet capture and visualize the results using a variety of visualization techniques. You can then filter the dataset and play back the data using a PVR interface. Version 1.92 adds the ability to directly load PCAP files.
It is the only tool on windows that looks promising in replaying traffic. The website desribes a sample ping trace between two systems and how to decode the generated visualization in detail.