2.5 uvrelax boundarys, plugins?

hi, quick question which I can’t seem to find an answer for - when you relax/minimize stretch in blender 25 it doesn’t move or take into account of the UV boundary’s? it obvousily shuffles the uv geometry inside but ultimately seems rather limited. Are their any plugins that can do a better job, and work perhaps similar to Modo’s relax function? (unless im doing something wrong)

I would rather not have to unwrap by hand as its not really viable, and trying to avoid shunting back into modo just to UV edit!

Best Regards,