I recall that there was a mod out there that automatically skipped turns for you. You input the date you want to skip to in the script and it'll go through the turns until that date is reached. I don't remember where it is, though.

The basic principle of it was that the script would use the control_faction command in a continual loop so that the player would be in control of one faction at one time, but when that faction's turn rolled around the player would then control another faction and so on. It wouldn't be too hard to code with a "while" loop.