This mod from seboden allows you to play the game between 2 AUC and 65536 AUC.
This small tool is a patcher for Europa Universalis: Rome, that will allow you to play the game between 2 AUC and 65536 AUC (instead of 474 - 727).
You will however have to make a few other changes to make the game truly playable before or after the original timeframe (like changing the average techdates).
To use it, just start the Rome_v1.1_Unlimited_Time_Patch.exe and tell it where to find your RomeGame.exe (it is in the Rome main folder) and click patch.
This tool will create a backup of your original RomeGame.exe and name it RomeGame.bak.
To play the normal game again just delete the newly created RomeGame.exe and rename RomeGame.bak back to RomeGame.exe.
No guarantee is given that your game will work correctly when modified.
YOU WILL FORFEIT TECHNICAL SUPPORT WHENEVER YOU RUN INTO PROBLEMS WITH AN ALTERED EXECUTABLE!
If you do encounter any bugs or technical problems while using this patch, verify that they also happen with the official Paradox version before posting in the bug report or tech support forum.
PS:I offer this mod here in the knowledge, that Paradox has so far always allowed the posting of no time limit patches for its games on this forum. If this policy has changed, I apologise (and will delete the patcher from the hosting site I use.)