[ns] Ask for Tcl script for TCP connection

Hello All, Could anybody please tell me: How to set up a size of packet, data rate in TCP connection in TCL script? What are the most important parameters in TCP connection. How to set up all bandwidths between nodes as 5.5Mbps?  If you have got a good Tcl script for TCP connection? Please

[ns] Xgraph plotting packet delivery ratio and throughput

can anyone please tell me how to plot packet delivery ratio and throughput via xgraph ,Please provide detailed description ,I've posted many times but not satisfied with the answers,i have to plot the graph for aodv and dsr for 30 nodes and 45 nodes ,tcl and awk scripts are required.