I currently have a file/print server using Windows 2003 Server and would like to convert it into a router while still retaining its file/print serving duties. I'll be purchasing two Intel PCIe dual port gigabit cards for it. How would I go about replicating the exact functions of a router, including security features, on my server? Also, which would be the better choice for wireless connectivity: attaching an AP to one of the server's ethernet ports or installing a PCI 802.11g card onto the motherboard? Would I also need crossover ethernet cables to connect between the server and the client computers?