shifting of home directory possible ?

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https://bbs.archlinux.org – i went through a lot of reading before i ventured into installation of arch. i installed from the august release and have successfully upgraded to current september 7 release.mistakes i commited....i wanted to install home on a seperate partition and i had mounted so in usb as instructed. but some how my home directory is residing in the same root partition and the /dev/sda7 which i allocated for /home is empty. further more, i am unable to access that partition from my home as it say i dont have permissions....how to make the partition accessible. and is it possible to shift the home director (HowTos)