Each folder inside the archive contains its own part of the original texturepack (body, hands & face).
They are all compatible with all other ALT1 based textures, unless stated otherwise.
That means you can use femalehands_1_msn.dds from here with any other ALT1 texturepack with no issues or seams (unless it is obvious or stated that you need matching hand textures).
Or, for example, use facial normalmaps from here with my Makeup series; the possibilities are as many as there are ALT1 textures at the moment.
The same can be said about diffusemap and specularmap compatibility. For example you can use SG body with original hand textures, fitness normalmaps from ALT1 and compatible ALT1 sweaty specularmaps. *