I unwrap the faces that need to be paint in gimp. I save the UV layout and when I open it in Gimp all of the faces are selected! I didn’t select all the faces I just selected faces that need to be paint in GIMP!!!
Could you show us a screenshot of what happens when you open it in GIMP?
maybe the UV layout save script doesn’t take into account what faces are selected… just saves all of them…
I think there’s an option wich says use selected only when you save the UV layout, maybe you forgot to click it?