No but you can see how each one relates to one another (their diplomacy score towards each team) which you can draw some conclusions from

as for Bailknights Mod, well the original had some game changes that messed things up but I think the one that is current removed those, check the thread to see

if they only effect the graphics (as the checksum is for gameplay changes) then the checksum does not change and it remains at zero, I believe Morguta set Bailknights Mod to do only the graphics so the checksum would be a not matter

yes, there is even a few mods groups that play together (like Distant Stars)

but like I said, if it is just the graphical changes than there is no need to worry about checksums