the song is babe im gonna leave you by zeppelin and the intro on guitar sounds like its one note right after another almost going over each other but i cant pick that fast so would i just drag the pick down along all of the strings or pick one at a time like i am or go without a pick and fingerpick it
http://www.ultimate-guitar.com/tabs/l/led_zeppelin/babe_im_gonna_leave_you_tab.htm
it's possible to pick it but if it's easier for you then just use your fingers
i forget what page does on the recording but i'm pretty sure he picks it (as in picking the individual strings not sweeping it down the strings like you suggested)