passwd/su how to no password also two modules files?

[Steve]

Hey, Im trying to do no password for my user account and root (please dont warn me about that ;0, It brings such freedom I love it.) I got it to work in /etc/passwd but just putting :: for passwd field and that works however when i do "su" it asks me for password and if i just press enter it doesnt think its correct anyonw know how i can get around that? (i havent hade time to mess with it yet so forgive me if its something obvious) also, im wondering how you manage different /etc/modules config files for loading different modules with different kernels? cause if you want to boot another kernel its gonna still use your other module config files so are you just supposed to replace the module configs files respective before you reboot or? thanks.   Steve.