ok when i gain root access do i need to type:

cd and then this: /usr/share/themes/base/meegotouch/libsysuid-screenlock-nokia/style/libsysuid-screenlock-nokia.css

or cd then enter and then this
/usr/share/themes/base/meegotouch/libsysuid-screenlock-nokia/style/libsysuid-screenlock-nokia.css

and do i need to put slash in front /usr or just usr?