I want to replace some textures of some clothing, how to do this? some came with templates, some with UV's, and there are some without these.

Thank you in advance 

Ggrape

I doubt theya re without UVs - those are in the model and basically specify which bit of the map each polygon is to use for its colour. The "UVs" are probably just templates by another name, showing how the model's geometry is laid out on the plane in its UV mapping - using that as a guide should tell you where to paint or apply pattern (you can resize the template, even unevenly between height and width, and it will work - the UVs specify relative postion across the map, not an absolute number of pixels). You can also export an OBJ file and paint directly onto it in an aplication that has that ability (from Blender to Mari).

Thanks s ill try to set this up, I don't know much about UV.s but now is the time.