ftp everything from one hard drive to your computer, then install the new hard drive, ftp everything back on to your new hard drive.
Ok, thats cool, just follow this beginner ftp guide, http://webpages.charter.net/modchipzone/ftpingproblem.htm Note that this is for the X3 chip, and will be just alittle different if you are using a different chip, but it is generally the same. Once you ftp into your Xbox then transfer the files from the hard drive you want to your computer by just dragging them from your Xbox side to your PC, then install your new hard drive and drag the files on your PC back to your new hard drive. If you need any more help after trying this guide, let us know...