is it able to use a router cable connected to a modem then to a pc to transfer files from pc to pc....

I don't think so, even if it is, it would be alot easier to use a crossover cable. Crossover cables are just your normal network cables with two wires crossed over (http://www.littlewhitedog.com/content-8.html. You could then connect the computers directly to each over via their network adapters.

you can use a router withur x over cables. all tht is requred is a router and then cnfigure the computers/ firewalls to accept each other using DIFFERENT addresses for the computers
BOL
M

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