I'm with jjmac. Also, it's easier when I have to make rollovers because I sometimes have to since there are some lazy designers out there (I should start charging a bit extra for that).

Yes, you are giving us the PSD, but if you don't trust someone, don't hire them. I erase PSD's after my computer about once a week (usually I wait a bit to make sure they don't need any changes). But as VI said, if you don't trust them, don't hire them.