To do pbem in two player games:
Create the game as you normally would, but make sure to provide a unique name for the game. I do something like this - ROP_DurkPrVsHHFD50Als. This helps me keep strait as to sides and from other games.
Then play your turn and save (but do not advance the turn)
Go to the saves folder inside the ROP folder.
Zip or rar all files (but not any folders) - this is important or the game files might become corrupted.
Send to your opponent.
Your opponent then makes that faction's moves, saves and runs the turn.
Then your opponent makes the next move and saves and send the file to you.
Four player is similar, but you need a host who gathers all files, executes the turn and then sends trn and saves files to all.
The bug is fixed, but make certain to apply this patch:
and these fixes: