all the glitch chips are the same
personally i like the team xecuter ones can get them reasonable priced from official resellers and they come with wires pre-cut to length and pre-tinned, very easy to install as they are colour coded.
much easier to buy a nand reader, look for team matrix usb spi flasher cheap and cheerful and again easy to use
as for the guides theres tons available, look on the team xecuter forums theres tons to follow
grab 360multibuilder 0.82 very good tool makes it childs play to create all images required
and also you will need nandpro v3 to read/write to the NAND chip