With an ethernet cable from your router or modem
no you can not
you cant psn shut down for ps2 therefore there is no online but even if there were nobody would play it.
Sadly you cannot... the makers of guitar hero actually didn't know ps2 was online so they made the ps2 version with no online access.
usb cord
For dial up kind of for broandband nohttp://playstation2.onlineconsoles.com/phpBB2/guides_getonline.php
yes
You can not
you do not
ya you can hook it up to any PC or laptop if they are usb enabled. most are.
No. Why would you think that you could hook a Sony product up to a Nintendo DS
YES
I guess usb cord, i THINK,