hey. i need a lil help.

um ... i was wondering if anyone could tell me how to do that lil staticy, "salt n peper" tv animation thing..?

like this:

(someone on greatestjournal.com's icon ... dunno who's. i saved it a LONG time ago)

but yeah ... idk how to do it. and i'd REALLY like to. so if anyone could help me, that'd be AWESOME.

& i'd like to note now that i use adobe photoshop 7.0 and adobe image ready 7.0 =)

thanks!
<3 manda