I haven't played this game in a while, but can't you just use that clock mod (control time like a BOSS... whatever it's name was) to set the RT:GT difference to 1:1, and then set the clock manually to whatever time it is on yours?
The downside to this is that when you log in again it will be whatever time it was when you left. I think more of what you are after is a script that reads the system time, and then sets the ingame clock accordingly, every new login. I think you could run a BAT file to do that, so that when you start the game, it runs the script, telling the clock mod what to be set to.
Again, a downside to that being that the environment will be the exact same as when you left... it would only give the illusion of a persistent world. Time wouldn't march on in the game when you aren't playing it.