Absolute position vertices in UV editor?

[Sirisian]

I've used Wings3D for years and haven't had an issue with the simple UV editor. In a current personal project though I need to precisely place UV coordinates. Is there a way to do that? When I use the modifier keys it does delta from the current position. This would be fine if I could place the vertex at (0, 0) to start, but I can't find a way.

The alternative atm is I can export and manually set the UV coords in notepad with an .obj format and then reimport the file. This works, but it's not very fast. I'm working on low poly hard surface architecture basically.

I'm not against using plugins.