I'm making this thread because I've been asked this question two million and twelve times
....so from now on I'm just going to link people here
To have 2 lowmax rigs in the same scene do this:
-Unfreeze/unhide EVERY part of the lowmax rig
-Select EVERY part of the lowmax rig, including the viewport sliders (the UI)
-Shift+Drag the rig (ie...copy it in the viewport)
-Once it's copied...DON'T TOUCH ANY OF THE CONTROLS YET OR YOU'LL BREAK STUFF!!!!
-Select the HEAD object of the duplicated lowmax rig
-Run this script:
it will work like a charm.
Please note...this only works for a second rig. If you want a third
rig in your scene, run this
However, if you want a fourth
rig in your scene, you're outta luck