question about adding music to my ipod (4.2.1 jailbreak)

is it possible to add music to my registered ipod from some one Else's computer?

[crait]

well, for you, go get SharePod. its the best youre gonna do. you can take files and add/take from any ipod, phone, touch. any. however, when you sync, itll take the music off, so use sharepod on theirs, then on yours to download the music off and onto your itunes

Thank you for your help

any time