Hi Matt, so the original post with the isometric setup is here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1917.35

To set up different ones, you might try using Options > View > "3D view angles" which will pop up a dialog that lets you set view angles, similar to Spherical coordinates as described here:
https://en.wikipedia.org/wiki/Spherical_coordinate_system

The "Up down angle" will correspond to the Theta angle labeled in the wikipedia graphic and "Left right angle" will correspond to the rho angle for the eye point position. If you set up one with that dialog that you like, you can then make a shortcut key for it using this:

script: moi.ui.mainWindow.viewpanel.getViewport('3D').setAngles( updown, leftright, tilt );

Change the updown , leftright, and tilt to the numbers that you used in the dialog.

The angles will place the eye point relative to the current rotation pivot point, you can set the rotation pivot point to the center of a selected object by using "Reset" on the 3D viewport's bottom toolbar or to a specific point using the Zoom area button on that same toolbar.

Hope that helps, - Michael