[Alneyan]

From easiest to hardest:

Overwrite the original files when using the Image mod. I believe it only matters for the Combat file though, which has different pictures from the regular game.

I do not know if the event mod can safely overwrite the basic file. Is it only checked for the host/game creator, or does it matter when playing the game?

There are instructions on how to combine the FQM mod and any other mod (TDM is given as an example, but it can be applied to most mods as well). You should make a copy of the B5 mod, put the files specific to the FQM mod (as explained in the help file) in the copy of the B5 directory, and the appropriate files in your basic Pictures repertory. It will overwrite the standard quadrants offered by B5 though, if there has been any major change done to them.