Look into neox's and dimwalkers suggestions. With a bit of finessing you should be able to fix overlaps. Edit:Rejoice! It looks like you can pin verts with unwrap pro after all =) https://polycount.com/discussion/235489/uv-straightening-and-its-perks-on-lod-generation
Unwrap Pro doesn't seem to respect any verts I pin down in the UV editor, whenever I pin down areas like the eyes or mouth and unwrap again it completely destroys the UV map I made and goes all over the place, not sure if you know of a fix for this?
To add the list of all these great tips: Experiment with some of max's other tools: including the move and relax brush for local tweaks, it's got strength and falloff settings too. And if you happen to have UnwrapPro, you can define density via vertex colors or soft selection. AFAIK the plugin won't let you lock border…