disable password prompt when accessing win xp pro comp from network??

Guess this question pertains to the windows xp pro operating sys. cause i can access my win xp home comp without being prompted for password. I am able to logon to the win xp pro comp with a password but its somewhat of an annoyance. I looked everywhere and so far people say u cant do it. Believe me, u can do anything with computers, i know there has to be a registry tweak somwhere, (i already disables "local access with blank passwords" = it still brings up password prompt) Any help would be greatly appreciated !!! thanx in advance