Hi Steve,

> is the a way to draw permanent construction line?

It's possible to make one that will persist through the same modeling session (not through file loading though) instead of disappearing at the end of a command like they regularly do.

See here for some scripts like "Keep construction line" that you can set up on a shortcut key:
http://kyticka.webzdarma.cz/3d/moi/#KeepCLine

Also a plug-in command that lets you set up persistent construction lines here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1029.1



> I want to place X number of objects to a bunch of points,
> still using a circle around the object to control depth, like
> ArrayGems.

I don't really follow how the circle spacing comes into effect for placing objects on to points, but for replicating an object to points see the CopyToPoints plugin here:
http://kyticka.webzdarma.cz/3d/moi/#CopyToPoints

- Michael