I did a ndure softmod and installed XBMC as the dash. I would like to put in a bigger HD. Is there a tutorial for this? I found one here:

http://wiki.hellowafflezone.com/Xbox_hard_drive_install

but it doesnt mention if there is any limitations on the size of the hard drive etc and I'm not sure if its reliable. Also it says I need to hook the new hd into my pc in order to set it up....I only have a laptop.....is there an easier more up to date method?

that is a good tutorial, there is no size limitations for the hd, you will have to hook the hd up to a pc, see if a friend will let you use his because i dont think you can do it on a laptop.