Loop Tools - Straighten - Constrain to Edge/Face?

I never knew this forum was here. Hopefully one of you scripters will want to have a go at this.

This would be a really useful tool. It's strange that it didn't work in the first place.

In Graphite Tools - Loop Tools - Straighten, if you check the constraints box (Edge/Face), it does not constrain. I came across a script (www).scriptspot.com/3ds-max/scripts/straighten-edge but it's a bit long winded to use frequently.

Does anyone know of, or know how to script it so that it works just like Straighten does, but when constrained. So you'd select the edge loop and press a single hotkey, or press Straighten whilst the Edge/Face constraint box is checked?

Ps. I had to put brackets around www to get past the spam filter