ok the Undo feature is a little buggy
this is What I've figured out so far
First off it a good idea to set up you Front End to be able to exit to window before you shell it (this will save a lot of headache if there are any problems)
if you make one set of changes and don't have to undo anything this program works great
If you do want to change anything you must undo everything you already did FIRST, this seemed to work for everything but the shelled program so, after the first restart, I check the box for shelling and left it blank, then restarted a second time and I was back to windows!
Then started over with a new set of changes and everything seems to be good
one other thing if you are replacing the startup image it MUST be: 640x480, indexed color space, with 16 colors(or less), 4-bit, bmp, with no compression
I would also set it to 72dpi but I'm not sure that matters
if this image is not right windows won't start