For " Follow active quads" method, do I need to make the entire object active or just the outside face? I have modeled this coffee cup.  I used materials and different colors to make different faces. When completed I plan on exporting it to second life as a 3D object.  I marked seams and unwrapped it. The "island" with the arrow is the brown outside face of the cup.  I need some experienced advise on how to unwrap this cup so it will properly take a texture.  If I use the "Follow active quads method", do I need to use it to unwrap the entire cup, all at once?   Should I try to unwrap island by island?
You can use Follow Active Quads on any selection you want.
I doesn't have to be the whole mesh.

Example of unwrapping a part of mesh using Follow Active Quads.