asteroid.tbl is dynamic, but doesn't have a modular version yet. I'll go ahead and do that too, using *-ast.tbm, since it's been on my todo list for a while and is a simple change. I had meant to make it modular when I made it dyanmic, but it wasn't my primary concern at the moment (I was actually making species_defs dynamic, but had to do asteroids too for compatiblity reasons).
icons.tbl has a fixed number of possible icons, but technically it's dynamic since it is proportional to the number of species. It's a little more difficult to make modular, since we'll have to change the format a little so that you must specify which species those icons are for, but it's on the todo list. Not going to happen until post-3.6.9 though. But I'll try and remember to make that change for 3.6.10.
mflash.tbl is dynamic, and does have a modular version: *.mfl.tbm.
sounds.tbl is dynamic, but not yet modular. Also on the todo list, also not going to happen until post-3.6.9.
species_defs.tbl is dynamic, and does have a modular version: *.sdf.tbm.
ships.tbl and weapons.tbl will be made dynamic when the new pilot file code gets here. But until then they are intrinsically fixed at their current limits because of network and pilot/campaign file compatibility.