Hi

To answer your questions in order:

you just add your iTunes Library to the list of shared files in Limewire Preferences.

thank you for being public spirited — Gnutella needs more people like you. Sadly, the majority of people don't care how many files they offer for sharing so long as they have what they want.

if you are based in America, I draw your attention to the recently settled case in which four students each paid about $17,000 agreed damages to the RIAA for offering large numbers of files for downloading. The RIAA is trying to persuade the ISPs to disclose the names and addresses of private users. Should that protective wall of confidentiality break, all large sharers become vulnerable and, unless you want to have the fun of defending your own civil case, perhaps small would then be beautiful.