I've gone through all the options I can think of. I am able to add up to the 4 places required by simply adding seats, but I can't figure whether or not it's possible to have bots sit there. Is there a way to play a 4-player game of solitaire (1 Human, 3 Bots)? This would be useful for playing 2-Headed Giant Solitaire also. Anyone know? If it isn't possible, I would very much like to suggest it, since it's good practice for real life games of the sort.
You could run multiple instances of Lackey. But solitaire mode is not really a focus, and it's not a high priority.