can I ?

[freeboy]

Can I save a game on my laptop etc and email a copy to myself and play on my desktop? each is on the same version of windows.. not that that should matter
If yes ...which file in the saved game folder?

[Durk]

Yes. You can do this.
All files for the current turn in the saved games folder are needed.
I you have done PBEM, just like that. If you have not, just highlight all current files, probably bundle them with zip or rar, then send. Create a new folder on you desktop in the saved game folder and dump the files into it.