adding songs/updating zune from guest?

[sharkfinblues]

maybe you guys could answer this question for me (PMed Gregory; alas, no reply): atm, i'm using a mates laptop for my internet and such and i was wondering, if i instal the zune software on this laptop, could i connect my zune as a guest and be able to:
a) update its firmware with this new release?, and
b) add new songs?

i REALLY want to avoid my music/vids/etc transferring onto the laptop if possible, while still transferring music onto the zune (60GB HDD, 80GB Zune )

thanks for any and all help, i really appreciate it!