About to buy a refurbished Ipod 5.5 and so many on forums say rockbox is way to go yet it seems like a lot of work to get it.I have yet to figure out how to put it on using an Imac since youtube has only people using a PC putting it on ipods.Im also confused as to how you put music on it if you have over 50 Gbs of music all on itunes like I do.Apparently once you have it you cant use Itunes?