Al Salam Alykom Ebu,
Dirst of all let me welcome you to Forums Help and say that I'm glad that you joined our community
As for the PSD file, yes it's not sliced as I don't slice with Photoshop or image ready, as I prefer using PhotoImpact and as for the locked layers, you can unlock them through Photoshop and it's not meant to provide locked layers.
Thanks again