Hi Mark, good to see you back here!

There is a script you can use for opening a text file with x,y,z points in it here:
http://kyticka.webzdarma.cz/3d/moi/#ImportPointFile

The first one listed there should work with MoI V2. For MoI V3 or later use the one that says "updated for OSX" (even if you're on Windows).

- Michael