For you Windows XP, no FTP program is required, Windows has a nice FTP program installed with XP. FIrst, you need to get the IP Address of your xbox. There is many ways to find this out. In order to FTP you need a a router, make sure your computer, and the xbox are connect the router. Most Dashboards tell you the IP address of your xbox. Look ar the dash, there should be a 192.168.X.XXX number, that is your IP Address. Once you have the IP Address, its time to FTP. Open "My Computer", in the address bar, type in the following:ftp://192.168.X.XXX
Fill in the "x" with the numbers the dashboard told you.For pics on this, click here
Once you connect, it will ask for a user name and password. Use the following:
User Name: xbox
Once you are connected, you can start to FTP, happy FTPing!