if i understand your posting correctly, OM runs fine in the way it should - without the realism packages like RFB or TMO? No improvements for realism concerning the atlantic theatre were given by RFB? that means, if i want to play atlantic, i should use OM, for fleetboats i can chose between TMO and RFB?
if this is true, i have misunderstood the meanings of OM. i thought, this package only gives german units and campaign files to the game and all the realism stuff should be taken out of RFB or TMO. I will give a "naked" OM version a try now... ( it is really hard in this mod jungle

)
edit: as you can see, i am new to the sh4 modding world (came from sh3). few minutes ago, i discovered the spanish work, a full atlantic package, including a campaign. i will give it a try now, perhaps, it is what i am looking for...
greetz, Jaeger