Sculptris draws base colors well,you need to use different color shades to make the texture look good just by using that.
The problem is the UV layout sculptris creates , it's very hard to texture it in Photoshop properly.
When making models,I personally DO NOT use sculptris or any other scuplting program to texture.
Usually it's a process of model in sculptris , reduce poly-count , import to 3ds max , fix mesh (if needed) , unwrap uv there manually , export UV in a format with transparency , open that uv in Photoshop and texture it /I usually skip the sculpting part if it's not for a character/

PC Specs:Windows 7 Ultimate 64-bit,Intel Core i7 960 @ 3.20GHz,NVIDIA GeForce GTX 480,12GB RAM,2x Western Digital 997GB HDD