Freedom force used the same daughter card as sky kid. Freedom force only seems to work on that board and only on the 6/7 side of board not 1/2 side. Sky kid works on all the boards. Rbi works on all the boards as well, but it needs a special security chip to function, and also only works on the 6/7 side of the freedomforce/sky kid board. I have not tried the boxing, but would think its the same
as rbi since it has a security chip also.
As for non daughtercard games, as long as you have the right ppu, you can play the games that match it.