if I understand you already have a modded xbox yes? Ill also asume you have an alternative dashboard, ie evolution x, if you do NOT have this, then you need it, (there are others but evox is probably the most popular) as this is the xbox ftp you will need a pc with an available network card a crossover cable (cat5 crossover etc) an ftp program on your pc, such as flash fxp forget dialup, it has nothing at all to do with connecting your xbox to a pc when you have those things, check out the tutorials that are everywhere, regarding network connections from xbox to pc
if you need a crossover cable i know where you can get one very cheap, i purchased one recently from this guy. leave your response in this thread.